What does limited slip additive do The system is active at all times and requires no driver interaction. If you're worried that the presence of a LSD would mean you need to add the friction modifier additive, don't. Friction modifier is to be used on Trac-Lok Limited Slip Differentials only, it is engineered to promote grip between clutch plates inside the differential. Your truck has the 3. This option wasn’t tied to a particular package, but was notated on the data plate. (G80). My '65 rear end has been flawless since the rebuild 30 years ago. What to do? My 2009 Cadillac calls for synthetic fluid with the additive. Computers react faster and work with higher precision than human beings. I was also told the as long a i used synthetic gear fluid that i don't need to use the additive. Limited slip additive HELPS the clutches slip. Learn what happens if you don't add it, how it works, and how to top it up correctly. Turns out 3 bottles to get same results the “old formula” gave. The only exception to that is the quadrasteer trucks. Learn how it works, its pros and cons, and what gear lube to use with it. I have a 1996 Chevy C1500 with 157k miles and the 5. I have a 1987 camaro that has 70k on it and i want to change the diff fluid and gasket and the owners manual states that i need a GM limited slip additive. Use Mopar® GL-5 Synthetic Gear Lubricant SAE 75W-140 in 12. When you hear clicking, grinding or knocking noises, it could be due to a failed differential. 24472 in stock $18. Are all brands of additive the same ? Can additive bought from different sources be mixed Amazon. How do driving conditions affect the performance of anti-spin and limited slip differentials? The performance can vary significantly depending on conditions like off-road terrain, icy roads, or mud. Was thinking about using castrol limited slip gear oil with either trans x limited slip additive or GM slip additive. I absolutely love the Genuine Mopar Fluid 4318060AC Limited Slip Additive! It’s a game changer for my car’s performance. Stick with the manuals and not the foolishness of the internet. Now it is included. If you’re pondering, “Do I need limited slip additive for my vehicle?” you are likely concerned about the potential harmful effects of differential additives and preventing rear differential damage. The stuff that works the best is the dark green colored Ford stuff. Thread starter Joined Jul 24, 2010 Messages 3,638 Location LONESTAR state. On the Venza, I have always used Mobil 1 Delvac 75w-90 with 5% Red-line friction modifier added which would make it closer to the Toyota LX limited slip Look under nearly any modern performance car, and chances are you'll find a limited-slip differential. I was running 80W90 before with CRC limited slip additive. It was called posi-trac additive or something. After adding the required lube, take the truck to an empty parking lot and do a series of figure 8's (about 8-10) to circulate the lube/additive. A limited slip differential applies some power to each wheel while allowing some difference in speed. Their main purpose is to smoothen the motion in moving parts to prevent the wear on metal surfaces. Many light trucks today use synthetic fluids and most of these no longer require the additive. How much limited slip additive do i have to add when filling it up with 80w90? Or how much should i Too much causes a one wheel peel out as you get slip when you shouldn't. I'll try the Valvoline Synpower 75w-90. 2 bottles of GM Limited Slip additive may cure all. 5 NA 4spd. Here is Oil & Lubrication - Limited Slip Additive - I was going through all of the fluids on my truck the other day and when I was picking up oil for the rearend, I bought a tube of K&W additive for the oil. I've noticed that you can buy gear oil with an additive already in it. 5. The ZR2 switches as there is just much more control. Mopar MS-10111 friction modifier. After a bunch of back and forth comments on this thread, including false 2009 OB 2. Reason is the unit uses no clutches or friction disc of any sort. use the oil and additive described above. Too much causes a one wheel peel out as you get slip when you shouldn't. That is only 1/2 correct. 25 $3. If you put in too much it will be too much slip, and what you're describing will happen, it will act like an open diff. I cannot speak to which kinds of limited slip mechanism require more or less maintenance. Since there is nothing in any differential that is not in a limited-slip differential, there should be no harm in using a friction modifier in a non-limited-slip Amsoil Severe Gear doesn't have Limited Slip additive in it, at least the 75w90 . The truck does not do any heavy hauling or towing and as such, I Most name brand GL5's have the LSD additive built-in, and it doesn't hurt if you don't need it. Likewise, LSD additive, while it will mix with the ATF, is not suitable in a mechanical component speced for ATF because it will affect the total chemistry of the resulting mix, and not in a good way. These are the brands that have the limited slip additive in them: Valvoline Castrol Lucas Royal Purple and a couple others that I do not remember right now. It should list which type of differential the truck has. "Lockers" have an arrangement that truly locks both rear axles together, up to a certain load point. May 14, Limited slip additive or no additive? Looked in the "maintaining your vehicle" section of my owners manual, under axle differental (rear), it reads "models equipped with "trac-lok" require a limited-slip additive. The answer is a resounding yes. So I have searched high and low and almost all gear oil says it is okay to use in limited slip axles. T. On the contrary, the ABLS works really good. C5 Tech - Limited Slip Additive - What does it do? I drained my trans and rear today and had synthetic Mobil 1 ATF and 75/90 gear lube ready to go. I have found that it does not last very long in early LS1 F-car diffs (some early models use an auburn style diff) either. Does anyone know if any of the big name brands make a conventional 75w-90 that does not have the limited slip additive? Valvoline used to but now it has the limited slip stuff. May 14, 1999 - 2016 Super Duty - Limited Slip Differential Fluid Decisions - for better functionality - I'm getting ready to change the fluid in my Rear diff (3. Without sounding too "nooby", how do I know if I need it? Thanks, Save Share Reply Quote Like. rumple. 0 (Dual Rear Wheel) Rear axles. I am not aware of a limited slip for this. Application. Nice. I'm referring strictly to mechanical, non-gear type limited slip differentials here. I use their 75W140 Easy Pack in my diff. Your rear diff is an open diff. $12. If it has 231k I would suspect the LS clutches + preload spring Limited slip additive is not needed. MetalSlug. I would look into amsoil which is the best of the best. Limited slip differentials are no exception and there are several other ways to limit slip and distribute torque that address the downsides of a traditional LSD. Find out how it works, what it does, and when to use it for your vehicle. Jan 12, 2010 #16 I changed the diff oil in my 2002 LS Explorer twice. But, I remember reading somewhere the new trucks do not require it, but what would it hurt if I added it ? Non-synthetic gear oil often does not have the additive. Friction modifier REDUCES friction so that the clutches can slip (less noise for clutch Posi's). Try running without additive and if you need it, it’s a small bottle that only holds a few oz so it won’t yet to add later. I stopped by my local GM dealer but of course they were out of the additive and I couldn't finish the job. Limslip Additive is designed for use with hypoid gear oils to change the frictional properties of the oil to give them the ability to be used in limited slip differentials. Do I have to buy the limited slip additive from the dealership, or does Autozone or Advance carry something similar? I know some of you will say to just buy Royal Purple or Amsoil gear oil, but I've already bought, opened, and used some of the Mobil 1 because I had to add a little bit of fluid to the front diff due to the leaking seal. As mentioned, having the additive when you don’t need it is usually not a problem. Because our differentials have different amounts of wear with different fluids the "correct" way is to start with a fresh fill and add too little FM. 25 / Fl Oz) Limited slip additives were used to modify the friction of the basic fluid to prevent "chatter" from the limited slip clutch packs. 2016 Outdoorsman, Thuren, Carli, King, Method, Nacho, PSC, EMF| 1998 12v, 4x4, Club Cab, Carli, Thuren, BlueTop, Core 4x4 Originally Posted by ABN_CBT_ENGR Originally Posted by John344 Greetings, I had a differential fluid change at the dealer? However, I suspected that the dealer didn't add the Limited Slip Additive even though the manual asks for it for my car for the rear differential? can I get away with not using it or I have to drain again and make sure to add the Limited Slip FYI, I recently replaced the differential oil in both front and rear axles on my 01 Isuzu Trooper with LSD/TOD. I have 2x Mopar Limited Slip Limited slip differentials are no exception and there are several other ways to limit slip and distribute torque that address the downsides of a traditional LSD. 50+ bought in past month. Differential fluid replacement in a G80 Mechanical Lo I ended up buying a bottle of Redline Limited Slip additive and using the entire 4oz with 2. Since then it's just a computer controlled brake feature that mimics an LSD. of the Ford M2C-192A additive - drive it a bit, and then recheck. R. Hypoid oils have additives to help them cope under extreme pressure, but as limited slip diffs still have hypoid gears in, I would assume limslip oil also has the same additives. Either way, the concentration of the additive in the synthetic oil is a huge amount. wet brakes). But remember they do not “lock” Now, there are different types, of limited slips. The LSD additive affects how much slip there is. YES! If it's a L/S add the required L/S additive. Stay tuned for the next post, where I will explain other LSD technologies including gear-type, electronic (like the BMW M2 pictured), brake-based, and torque vectoring! Limited slip differentials are no exception and there are several other ways to limit slip and distribute torque that address the downsides of a traditional LSD. Differential fluid replacement in a G80 Mechanical Lo Genuine Mopar Fluid 4318060AC Limited Slip Additive – 4 oz. I always recommend adding 1/4 of a tube increments of LSD FM additive to Limited slip differential (lsd) additive is crucial for optimal performance, as it helps protect the differential and enhance overall performance. Replacing it can cost you more than just adding limited slip additive from the start. How Do I Know if My Ram 1500 Has a Limited-Slip Differential? Check the owner’s manual to know if your Ram 1500 has a limited-slip differential. When the Mustang first launched, it came with the option of a limited-slip differential. It’s a common query with significant implications for your vehicle’s performance. The 1500, 2500 and 3500 GMT 800 Trucks utilize SAE 75W-90 Synthetic Axle Excessive amounts of LS additive will kill your limited slip action- "one wheel peels" will result. cause the oil to degrade more quickly. 99 $3. It feels to me like clutch chatter in the rear end. "The following information outlines the type of rear axle lubrication utilized in GM Truck axles. Designed to evenly split the power being sent between drive wheels, LSDs are used on The only limited slip in a Duramax of any year is the Eaton gov-lock (RPO code G-80) and does not require a friction modifier additive. It's 1987 - 1996 F150 & Larger F-Series Trucks - What Gear Oil and Additive for Sterling Limited Slip Rear - Need to change the gear oil in the rear end of my 95 f250 powerstroke with the Sterling 10. It says to use 2 to 5 % by weight. Feb 2, 2021 #3 Yea Mobil 1 or valvoline synpower . Does that mean I don't need to add the limited slip additive? Thanks J DIFFERENTIAL | LIMITED SLIP - What does a limited-slip differential (LSD) do? The primary function of a limited slip differential (LSD) is to effectively distribute torque as needed. How to use it? Using Mopar Limited Slip Additive is a straightforward process. I just found this on oil medic, does not answer my question, but it was informative! " A performance area not addressed by industry specifications is limited slip. What does a limited-slip additive do? Instead of formulating multiple gear lubes of the same viscosity, but different frictional properties, to address occasional chatter in limited-slip A limited-slip differential uses clutches to distribute power between wheels with traction. I don't see the point in adding in 2 bottles of additive along with gear oil that already has additive in it. Mobil 1 Syn Gear Lube LS 75W-90 combines wax-free synthesized hydrocarbon base oils and a specially designed extreme-pressure, limited-slip, sulfur-phosphorous additive system to help provide a significantly higher level of performance in rear axles and differentials versus conventional fluids. Why the distinction? Warning-As previously mentioned DO NOT add an Limited Slip Differential additive to a G80 Locking Rear Differential. I have limited slip differential. Find out the viscosity, GL-5 rating, and Yukon products for your differential needs. Joined Jun 21, 2008 Messages 116 Location USA, NJ. They've updated it then, and I was right on with the limited slip additive. Although I have a GT, I have been referring to the Mach 1 owner's manual for more comprehensive track use Some LS additives (friction modifiers used to control the breakaway characteristics of limited slip clutches) will increase the oxidation rate of the oil, i. We have some profession confirmation of this but what we don't have is the knowledge of exactly which additives do that. It's hard to find a gear lube that does not have the additive since the additive is compatible with axles that do/don't have the LSD. During regular driving conditions, a positraction LSD is engaged, ensuring equal traction is INFO on MOBIL 1 Mobil 1 Synthetic Gear Lube LS 75W-90 is a supreme performance, synthetic, multi-purpose, SAE 75W-90 automotive gear lubricant designed to meet the highest level of performance requirements of modern passenger vehicles in all types of operating conditions, including limited slip applications, as well as delivering outstanding Vehicle is 2001 Dodge Ram, 64k miles, 2WD, Limited Slip differential. These differentials are typically open differentials at heart with modifications or additions. On the next fluid change, I used Redline 75w90 in it, and didn't have to add any LS additive to keep it from chattering. Mopar limited slip friction modifier additive. Odds are the guy didn't put it in or used a fluid that says good with any differentials, no additives needed. Limited slip differentials (LSD’s) also known as posi’s, are the go-to performance differentials for racers, overlanders, work truck owners, and others. The available Electronic Limited-slip Differential (eLSD) system directs torque, enabling the vehicle to drive over terrain and road conditions that a conventional axle cannot. I doubt the differential fluid has ever been changed and I called the dealer to ask what gear oil to use, they said 75w90 with a limited slip additive, but when I called another dealer this guy, who seemed like he knew what he was talking about said not to use a Limited Slip Differential. But common aftermarket ones you will see are . Axle code is C5 limited slip with 4. A different Remember you will need to add limited-slip additive to the fresh diff lube after the conversion. In the old days, we had to add a bottle or two of factory limited slip additive to the differential lube to keep the clutches on the G80 from chattering. 7L Automatic with the limited slip rear end and 3. They gave me the 4 qts of fluid and I asked about the additive since I had a LSD. Select the department you Use Mopar® GL-5 Synthetic Gear Lubricant SAE 75W-140 in 12. So you'll run a little short on the additive. I used generic NAPA LSD additive in my other GTO with limited slip, and my Toyota Tundra, without any issues. The additive reduces friction between your limited slip or positraction differential friction plates to eliminate the annoying chatter that is common with these types of units. It has clutches. The rep told me they do recommend adding 4 ounces of friction modifier to bring it to ford spec. GM has 2 variations of the G80, one for use in cars and one for use in trucks. I'm get a lot of noise back there, so I changed the oil and I'm still getting. I also asked about their Valvoline LSD additive and he said they only sell it to "trained" shops. Find out the viscosity, GL-5 rating, and Learn how gear oil and friction modifiers work to lubricate and improve the performance of clutch-type limited slip differentials. Castrol sells a gear Benefits of a Limited Slip Differential 1) Off-Road Traction. Those are used in cars like the Camaro, Cadillac CTS etc. Features and Benefits. Actually friction modifiers do just what it says modify friction. Additionally, spring tension and clutch-friction properties change with age and wear, whi Learn how gear oil and friction modifiers work to lubricate and improve the performance of clutch-type limited slip differentials. Look at the UOA in the link below. I have Pennzoil Platinum 75W-140 Limited Slip full synthetic and Castrol 80W-90 limited slip (non synthetic). Most make the fluid "slicker" than it originally is, such as the Limited slip additive from GM, but also LubeGard HFM, which is used to bring Dexron ATF to standards for Chrysler ATF 3+ and Honda ATF fluid (these are much slicker than Dexron and without lubegard you get clutch shudder and the trannies Any fluid that says the additive is not part of the fluid all ready. We break it all down for you, and tell you why you might want one. How I do it is, add a little bit of the gear fluid then add the additive to said gear lube bottle. Learn what limited-slip differential additive is and how it helps to eliminate chatter and improve traction in limited-slip differentials. Go with the mopar stuff if your worried. I do have the GT5 RPO code. This is my only aftermarket limited slip, but I do have a factory limited slip in my 2016 Mustang GT that never chirps a tire. 9 4. Trending. I added a bottle of limited slip additive, and the problem went away. Hope this helps! Kendall® Limited-Slip Axle Additive Concentrate is a special additive used to modify the frictional characteristics of axle lubricants for use in limited-slip differentials. Limited-slip differentials (or LSD) are used in many vehicles to allow different wheel speeds, transferring more torque to one wheel when it is slipping. Bottle. The G-80 is only an RPO code for a traction control device. CA 7311; KY 8904; MN The limited slip additive is an additional product needed for the diff to perform in the way it was intended. Is this ok to use, or do I need to by a separate bottle of additive, and mix it with the regular oil? Thanks I'm guessing (and please correct me if I'm wrong) that limited slip additive/friction modifier is added to some gear oils to allow them to function in a limited slip differential without adding an additional product like this: Limited Slip Friction Modifier. 9 out of 5 stars 492 ratings | Search this page . It is a limited slip with 3. 0-4x4 CCSB- DMax and HHR are gone and I've gone gasser. (which is why it stinks so bad) If the clutches still chatter, more additive can be poured in. Should I I’ve used the GM additive for years. Those are the only GM trucks to use a limited slip differential. I hope this information helps someone. I'm trying to identify whether or not I have limited slip because im not going to use the GL-5. 73 LS) in my 99. Does Lucas Gear Oil Contain Limited Slip Additive? The question of whether Lucas gear oil contains limited slip additive is a common one among vehicle owners. You can confirm the presence of the additive on the back label of the gear lube bottle. He says I know, I use amsoil and everything I own. It will not hurt anything if you put in the the rear and your rear does not need it. In a limited slip differential (LSD) frictional couplings conne Initially, the slip additive is homogeneously dispersed in the film and, consequently, its surface concentration is low (Fig. . Looking to change my rear diff fluid. Now I can take those sharp turns without any worries. Has any one had any experience with these brands. It’s tough work and it’s dirty work and it is why that quart or two of fluid in your rear So a recent "got stuck" thread by @ArgonautVans got me thinking about the technical function of the 2020 onward Transit Limited Slip Differential. Please make a selection for each of the required (*) options above before adding item to cart. I’m a big fan of drifting, and I’ve been using Positraction Friction Modifier for my limited slip differential for years. Look under nearly any modern performance car, and chances are you'll find a limited-slip differential. I'm planning on replacing the diff fluid in my '02 Ranger 2WD which is limited-slip. The G80 locker does not. Make sure that your brakes aren't dragging; the emergency brake bellcranks can be sticky due to corrosion, giving drag until they pop loose. Two tubes he said. 25 per Fl Oz ($3. According to instructions I've read elsewhere, you need to make some tight figure 8's, 5 to the right and 5 to the left after adding the new lubes. Some drivers report immediate locker engagement and better traction with limited slip differentials, while anti-spin differentials may be highly effective in snow without Toyota limited slip differentials require more additive than what is put into the Valvoline product, so, you would need to add more fiction modifiers to our product. 99 with 22 percent savings -22% $ 12. For years, they have provided power and control, essential for helping you win on the track or exploring rugged places with no asphalt in sight. Limited Slip differentials are preferred in Performance cars because as the name implies they allow Limited Slip. The brand or type of gear oil may be the determining factor in He also was published in High Performance Pontiac magazine back in the '90's with an article about overhauling the 'non rebuildable' cone type limited slip in these cars. Not needed in Gov. It says you don't need a limited slip additive nor is one recommended. GM limited slip additive is formulated for use in limited slip, posi-traction rear axles, limiting excessive clutch plate friction for reduced chatter and rear end noise. If the axle fluid is not pre-mixed with limited slip additive we recommend using Over time many limited slip differentials develop clutch plate chatter due to degraded frictional properties of the differential fluid. 42 ratio (GU6) with a limited slip diff. Ok, I'm going to try the Valvoline product with the additive, as is, and I'll look for some additive if I get some chatter in the rear. Sort by Oldest first Oldest first Newest first Most reactions. The label on the bottle says Limited Slip on the top corner of the label. My 3. TheLoneRanger. Neglecting limited slip additive is not worth the risk. Using non-synthetic 80W-90 GL-5 will produce optimum performance in our Dura Grip clutch-type units. I used Lucas non-synthetic oil with an additive in clutch type diffs, Amsoil synthetic in TrueTracs, both GL5. All Articles Cars Videos. avoiding this chatter. But if you have a mechanical limited slip like the Trutrac they recommend “I recently bought the Genuine Mopar Fluid 4318060AB Limited Slip Additive and let me tell you, it’s a game changer! I was having trouble with my limited slip differential, but this additive fixed it right up. Torco Limited Slip Additives are formulated for use in limited-slip and positraction differentials to reduce hypoid gear noise and chatter. Due to the limited compatibility with the organic substrate, the slip additive migrates to the surface, thus the concentration at/on the film surface increases (Phase B) and the COF decreases. Both AWD 14 Venza-120k mi and 21 RX350-17k mi call out Toyota LT non-slip gear oil. No mention of "Trac-Lok". The amount of this additive is minor and shouldn't cause any issues with your G80. Usually better than a mechanical limited slip. There are many types of limited slip differentials and, like I mentioned, I won't get into how they operate, just how they affect the car. AMSOIL SEVERE GEAR is compatible with most limited-slip differentials. It's a somewhat delicate balance, and once you get it to feel about right, just leave it alone. This additive is essential for ensuring that the differential operates smoothly and evenly distributes power to both wheels. Limited-slip differentials have additional clutch packs. I'm sure I'll find some tomorrow and I was wondering what the Limslip Additive is a supplement additive designed specifically for use in limited slip differentials to overcome problems with squeal, squawk or chatter. I feel like I’m driving on butter every time I hit the road. They can also be called boundary lubrication additives. Should I use 80-90w or like a 90-140w and what additives or friction modifiers Does anyone know if GM has an additive for the limited slip rear end. The oil is safe to use in a non limited slip and then you can add more Limited slip additive if needed. I have 1 4 ounce bottle of Mopar additive left over from years ago. I have a (very) slow leak from my 8 3/4. Genuine Mopar Fluid 4318060AC Limited Slip Additive – 4 oz. From what I can tell, Limslip oil is designed for vehicles with limited slip differentials, and thus has extra additives over a normal hypoid gear oil. Compared to an open differential, you will get better off-road traction with a limited slip differential. In their truck line, it has been the code for the Eaton M-Locker, seen here: Compatible with petroleum or synthetic gear oils. I'm sure mixing is fine but I prefer to keep things the same. Fluid Type II. After draining the oil and refilling, add 1 bottle of fluid. The G-80 is a glorified, part-time LSD, period. I'll add 8oz. Differential manufacturers use different spring pressures and clutch discs made with different materials and surface areas. Share. That additive is only like 5 bucks. This is where Mopar Limited Slip Additive comes into play. 5 Crew Cab Long Bed LLY 5in . The factory differential fluid, 89021677/10-4016 includes the limited slip additive. per fill unless the manufacturer specifies otherwise. OILADD. The 4 oz bottles of LSD additive I've seen say they are either good for an entire axle, up to 4 quarts in volume, or the 4 oz bottle is good for about 2 quarts. Cat FD-1 – Intended for final drives and axles in Caterpillar equipment types that do not contain friction materials (i. As most of the gear oil say they already have the limited slip additive in it, but you won't use up both bottles. code5, what viscosity does your vehicle call for? Maybe we can find a synth oil with no LS additive. 73 gears. Joined May 27, 2002 Messages 1,527 Location Southeast United States. 232 posts Trans-X® Posi Trac® Limited Slip Gear Oil Additive, 7 Fl Oz Equa-Torque® Differential Friction Modifier, 4 Wt Oz . 89. Friction Modification: Limited-slip differentials function by allowing some degree of slippage between the two drive wheels while still providing power to both wheels. Its sole purpose is prevent noise. S. Ashley Dunn. GM G80 does not require a limited slip additive either, it does have clutches. But you have to put the additive in the rear differential anyway. Improves gear oil performance. Does My Mustang Have a Limited-Slip Differential? Mustangs have used limited-slip differentials on-and-off throughout the years. Because of hardware differences among the various limited-slip differentials, no standard industry-wide test is available to evaluate a lubricant's ability to prevent chatter in this application. 10s. Neglecting limited slip additive can result in strange noises coming from the rear end of your vehicle. Over time many limited slip differentials develop clutch plate chatter due to degraded frictional properties of the differential fluid. It’s important to adhere to your car manufacturer’s Oil & Lubrication - Limited Slip Additive - I was going through all of the fluids on my truck the other day and when I was picking up oil for the rearend, I bought a tube of K&W Even the limited slip axles in newer Dodges only require synthetic fluid. They often mistakenly think that the "locker" is a mechanical type, but it is actually a pawl-operated clutch system. LXE® Technology in additives like LUBEGARD® ensures your gearbox runs cooler and quieter. Amtrack. The clutches are disigned to apply torque to a wheel not spinning like slipping a I recently had the opportunity to try out the TriboDyn Synthetic 75W90 Gear Oil with Limited Slip Differential Additive in my car, and I must say I am thoroughly impressed. I have been disappointed at the limited slip factor that I have right now and want better lockup with less slipping. Last year I did a diff lube change in my Dodge truck with Mobil 1 75w90 that was labeled LS. The manual says to use GL-5 across the board. Hopefully pick up a little better fuel economy. TRANS-X POSI-TRAC Limited Slip Gear Oil Additive is designed to quiet chattering differentials and improve gear oil performance. Too little additive and it will lock up too hard and wear out too fast. Only limited-slip diff in select performance cars and vehicles of that nature will call for that particular chemical additive or fluid spec. In such a case with a standard differential, the slipping or non-contacting wheel will receive the majority of the power (in the form of low-torque, high-rpm rotation), while the contacting wheel Hey! My VIN Equipment Listing mentions that I have Command-Trac Part Time 4WD System. Both the front and rear differentials were filled with Amsoil SVG. 39/qt Original Mopar limited slip additive is under $10/4oz, so from that standpoint, I don't see a reason to pay $6 extra per quart of oil, if the 80W-90 works, or even if the 85W-140 works. Joined May 27, 2008 Messages 6,138 Location Parts Unknown. Select the department you Does anyone know if GM has an additive for the limited slip rear end. Lately I feel a shudder if turning tight backing or going forward at slow speeds. Chevrolet Performance has formulated this limited slip lubricant to reduce unwanted noise and wear. Quantity. When I got home I 75w-140, says in owners manual and on the rear end tag. e. UG_Passat. Genuine GM Fluid 88900330 Limited Slip Axle Lubricant Additive - 4 oz. After a bunch of back and forth comments on this thread, including false Friction modifiers are initially used for applications like transmission fluids, power steering, limited slip gear oils, and tractor fluids. I would still add it. Another way is to look for the “LS” designation on the truck’s build sheet, which shows crucial information about the vehicle. I'm looking for something similar to the 75W/90NS, but in a conventional oil. 5 Crew Cab Long Bed LLY 5in Compatible with petroleum or synthetic gear oils. I have previously used 80W-90 GL5 with LSD additive but this time I used Pennzoil 80W-90 GL5 with no LSD additive since the Pennzoil claims that "because of its unique formulation, neither LSD additive is necessary, nor is one recommended. Will help “limit slip” between the axles. I'll fill the differential but leave enough room for the Ford limited slip additive - drive the truck to get the rear end warmed up and then do some figure "8"s in a flat parking lot. CRC Trans-X® Posi-Trac® Limited Slip Gear Oil Additive is a great way to NO additives! Pickup trucks and SUVs equipped with g80 do not require the additive. Understanding Torque and Traction Control Auburn recommends using Auburn limited-slip additive (#504102) with a high-quality non-synthetic 80W 90 hypoid ol. The only oil I can find that does not have these additives is the cheap Walmart brand. Warehouse Availability. Most gear oil has some already added. Bottle : Everything Else. About 10,000 miles later it needed another dose of the stuff to get it to shut up again. Toyota stopped putting real limited slips in the Tacoma back in 2008 or 2009. I’ve used the GM additive for years. The "Anti-Spin" has me confused on the factory specs listed below. I want to change the fluid to Valvoline 75W 140 which is a full synthetic. In 09 and later though, it seems the limited slip functionality is no longer mechanical and is done via the brakes instead C5 Tech - Limited Slip Additive In Rear End - What does the limited slip additive do for the rear end? I understand you do not need this additive for Amsoil and Redline but do for the stock gear oil. Having never done it, I read where vehicles equipped with electronic (ELSD) axles require a limited slip additive. Function and Mechanism of Limited Slip Differentials. What axle ratio do you have in your Canyon or Colorado truck? Deciphering RPO codes for the GMC trucks. What limited slip additive is everyone using and how much are you adding with a rear axle change. When you were asking about mileage, were you actually asking how many miles the limited-slip will last compared with an open diff? I understand limited-slip clutches are a wear item, so that is a potential issue over many miles. I'd really rather use a 75W-90 full synthetic (Mobil 1) with the LSD additive already mixed in. Tom Ashley 04 2500HD 6. I myself never used anymore than 1- bottle of GM LSD additive in my own C4 or other cars. It most certainly has clutches, and it will not function well Hi folks. This stuff says it's especially suited for limited slip differentials and is an excellent replacement fluid for rebuilt limited slip units. Thanks! PandaBear. It's like $6 at AutoZone, otherwise go and grab some from the dealer. Do not use synthetic oils. Limslip Additive is also used as a supplement to Limited slip differentials, developed over 40 years ago to counter drive wheel slippage when different traction conditions exist on either side of an axle, are still widely employed by the automotive industry to improve driving control. Stay tuned for the next post, where I will explain other LSD technologies including gear-type, electronic (like the BMW M2 pictured), brake-based, and torque vectoring! On the contrary, the ABLS works really good. I understand I need to use 80W-90 for both diffs (never tow anything), but I'm just trying to narrow down if I need the limited slip additive in the rear axle. ACDelco Limited Slip Lubricant Additive. I bought Royal Purple brand with limited slip additive and figured I should be 100% sure before I go climb under the car. Quick research shows that the limited-slip, mechanical differential was only used in the 05-08 Tacoma Sport models which does need an additive added when changing the rear differential fluid. From some of the old (and to answer the first part of your thread title and question, no your 2018 does not need a gear oil with limited slip additive in it. Look at the label, if it says something like; "may be used for top-off and refill of conventional and lsd axles", your good to go. If the axle fluid is not pre-mixed with limited slip additive we recommend using So a recent "got stuck" thread by @ArgonautVans got me thinking about the technical function of the 2020 onward Transit Limited Slip Differential. CRC Trans-X® Posi-Trac® Limited Slip Gear Oil Additive is a great way to Torco Limited Slip Additives are formulated for use in limited-slip and positraction differentials to reduce hypoid gear noise and chatter. Reduces friction, wear and overheating while eliminating chatter. I said well I have amsoil in there and they said it's not necessary to put an additive in there. There are a few that will run at the ragged edge and find the limits. It’s the best additive I’ve found for Hi, The 8. The goal of lubricant formulators is to develop new products that retain Limited slip additives are crucial for improving vehicle performance and differential longevity. SavagePatch. com: Genuine Mopar Fluid 4318060AB Limited Slip Additive - 4 oz. Check the the level of the gear oil and add the limited slip additive. Skip to main content. Ford Additive: C8A219B546A GM Additive: 1052358 Auburn Gear High Performance Oil Part Number: 504107 (quart) Auburn Gear Limited Slip Additive Part number: 504102 (6 oz. If that is what you have, add 4oz of friction modifier XL-3. Joined Aug 5, 2002 Messages 23,740 Location Silicon Valley. I. A. Change teh fluid and no trouble since. Stay tuned for the next post, where I will explain other LSD I used GM limited slip additive in my (trucks) rear end when it started to chatter. NO additives! Pickup trucks and SUVs equipped with g80 do not require the additive. Use with conventional GL-5 or synthetic gear oils. They keep the RPM up as many people with poor car control would I used the valvoline full synthetic 75-140 and it does say limited slip on the bottle but I wanted to make sure so I called valvoline (1-800-team-val). " Limited-slip differentials also typically require a specific lubricant with a limited-slip additive. The formulation of our Limited Slip Additives modifies clutch plate friction for applying and releasing clutch plates and improved engagement. It helps reduce friction and wear on the gears, preventing damage and improving overall performance. For open differentials, lockers, and Torsens - FM doesn't affect the operation Limited slip additive is a fluid that improves the performance and longevity of the differential system in vehicles with limited-slip differentials. I've considered Mobil 1, but I'm leaning toward Pennzoil 80W90 GL-5. There is a requirement to provide limited slip additives that give excellent friction plate lubrication. Does that mean that I have a Limited Slip differential, right? I am about to change my diff fluids, and the manual says that: Models equipped with Trac-Lok require an additive. The proper Redline viscosity MTL will be great. Not all lubricants have the same additive chemistry which is why we use specific additive packages for specific applications in finished products. Limited slip additive is required for limited slip axles. Have to try it if you want to. CRC Trans-X® Posi-Trac® Limited Slip Gear Oil Additive, you can quiet chattering differentials, and prevent jerking and slipping in just minutes. In non-limited-slip racing differentials and quick-change units using the Red Line ShockProof Gear Oils an additional 3 to 6% Red Line Limited-Slip Differential Friction-Modifier / Break-In Additive is recommended. For applications that require additional limited-slip friction modifier, add AMSOIL Slip Lock®. Not using an additive can lead to Using an excessive amount of limited slip additive may not cause immediate damage to your rear differential. FWIW, this Castrol Gear Oil does not have enough limited slip additive for a 9" Ford differential with a factory style traction-lok limited slip. I'm going to service the rear end and had a question about the additive that is needed. Thank you for the advise. So it seems it is not included. Allows the clutches to engage properly. I would have used the Amsoil LS additive if I could have found it locally and not only online. I want to top off the fluid. Now, keep in mind a limited slip differential. Add to Cart . I run an Auburn limited slip in my 1/2 ton Ram. It helps to eliminate chatter in limited-slip differentials when added to non-limited-slip API GL-5 gear lubricants. First, make sure your vehicle’s differential gear oil capacity matches that of the additive bottle (4 oz). Question - do I need to worry about the limited slip additive? When I first filled it, I know I used a bottle of the skunk oil, but I've read online that if I find gear lube that states it's good for limited McMillan recommends adding two bottles of Ford SVO limited-slip additive and doing a bunch of figure-eights in a parking lot to break in this unit. To achieve this controlled slippage, LSDs rely on a friction modifier in the gear oil. Friction modifiers are initially used for applications like transmission fluids, power steering, limited slip gear oils, and tractor fluids. This is reversible by changing the oil/reducing the amount of additive. " I guess they've realized pretty much everything is using it now and had to lighten up. 4. 55 Ford Limited Slip Differential isn't happy unless the additive is in it, the so called gear oils that say no limited slip add needed didn't cut the mustard. 75-90 syn is fine and it gets cold in Denver. Well after I was through I got to looking at the book and it called for I ran 75w85 limited slip fluid and a bottle of mopar limited slip additive in mine. Take the car out for a short drive to mix the fluid then do a couple of slow, very tight turns and listen for popping. Which is why I added one bottle of the GM stuff. 5qts of the Amsoil Severe Gear 75w140. What can it do that a manually operated limited slip differential cannot achieve? Here are the benefits of using an eLSD over a standard LSD or other differential variants: Improved Performance. Clutch Type; Cone Type; Helical Gear Type . Friction Modifier additive eliminates noise that can occur when limited-slip mechanisms engage and disengage. My '97 used to do that, and a little bottle of MOPAR LS additive smoothed it out. Friction Modifier Positraction Additive for Limited Slip Differentials. Cars use a Limited Slip differential which is designed to engage and slip, it never fully locks up. What is a cone clutch? The Auburn Gear limited-slip differential employs an integral cone clutch side gear unit that creates I am changing the diff fluid in my ford nine inch rear end. This is due to the LSD additives reduce or eliminate the "stick-slip" action in order to reduce mechanism wear. Equivalent or compatible with other Limited-Slip Differential. The locking does require an additive. As to Molekule's statement about GM limited slip additive. Jan 19, 2006 #4 Jim, I'd suspect you have worn out clutch packs, for the shudder to start at that particular speed. The main advantage of a limited-slip differential is demonstrated by considering the case of a standard (or "open") differential in off-roading or snow situations where one wheel begins to slip. and since you have a fx4 you have a limited slip you need the additive, usually start with 4-5 ounces and if its smooth and doesn't clatter your in the clear, I used royal purple gear Will More Limited Slip Additive Hurt My Rear Differential. 01-20-11 11:44 PM - Post# 2034893 This subject comes up often enough I thought I'd re-post this service bulletin and include it in the FAQ. 5 F250. The G80 locker does NOT need, nor does it use any friction modifiers The G80 limited slip, like some of GMs other vehicles has, does use a additive. Shake it, add to differential. Planning on changing the differential oil. NOTE: This is also a case where more is not better. If it is not a limited slip diff, you can pretty must just make sure that the oil is slippery, and you'll be fine. Amazon. Regardless of what others state, the G-80 does have clutches. Reply reply Yukon Friction Modifier Additive for Limited Slip/Posi - 4 Ounce Bottle. Red Line Gear Oils already contain this additive (except the NS). GMC SLT 2004. I take this to mean that I may have a rear diff/axle with limited slip, which means I can use oil that has the limited slip additives. He said it was already in the bottles. LSD additives are versatile, The friction modifier does the same thing as it does with friction modifiers in transmission fluids. Also on the front you really want more control. Using the fluid alone resulted in some noise when turning. Uses this hypoid gear design where the Extra LS additive will reduce the ability of the clutches to grab and hold, making it act more like a open differential. The difference between a limited slip and "Locker" is a limited slip is a spring loaded clutch arrangement in the differential that sorta locks up both rear wheels. 6; Phase A) and the COF is high. ) 1 2 Trucks do not have a limited slip differential. I am referring to the limited slip additive for differentials, and I don't really understand how it would help or hurt. Pennzoil's specs for this oil say it has the friction modifier "for limited-slip differentials". The oil from the rear differential Clutch type limited slip differentials, commonly called posi, require an additive. All of GMs truck come with either an open diff, or the G80 locker. But I would get chatter from the diff in low-speed tight turns. I will add the "spec" Mopar® Limited Slip Additive Mopar® P/N 4318060AB first and then the "spec" Mopar® Synthetic Gear Lubricant SAE 75W140 Mopar® P/N 4874469. Lucas gear oil is formulated with a proprietary blend of additives, including limited slip additives, to provide optimal performance in both conventional and limited slip differentials. Your owner manual or service guidelines will state synthetic gear lube ONLY, for the rear axle. This technology provides better traction on slippery surfaces. But as of late it does not seem as good. I added some Motorcraft additive and it is as quiet as ever. Watch this video to learn more about the Electronic Limited-slip Differential. In an effort to collect some data points for arguing with the Dealer about putting Limited Slip Additive in the differentials unnecessarily, I called the SRT Consumer Assistance line. I don't have the G80 RPO code in the glovebox which, as I understand it, means my truck does not have the G80 diff. Thanks for choosing Valvoline! The brand will not matter. Before the war Ferdinand Porsche and ZF created a differential that would always send power to the slower wheel, but it wasn't until the mid-1950s that Studebaker-Packard introduced "Twin-Traction" which is widely considered the first modern, clutch based, limited slip differential. So now I'm wondering if there is an additive. I don't know anything about that car, but, if the differential is a limited slip, then you must either use a limited slip fluid, or a limited slip additive to conventional gear oil. Do not use more than the 4 oz. 8" can be either locking or non-locking. I realize what GM calls the G-80, but that does not make it a real "locker" they way I was raised to think of them to functionally be. My Z's diff chattered when I bought it, so I added the FM. Option Code for trucks/suvs G80 Differential, heavy-duty locking rear Option Code for Camaro G80 Differential, limited slip G96 Differential, electronic limited slip:arrow: Severe Gear 75W-90 Product code SVGPK-EA 2) 85W-140 without the additive, only $4/qt! 3) 80W-90, without the additive, exactly what I run in my motorcycle, $5. OR AMSOIL # ADABA Slip Lock Differential Additive - 4 oz. The manual says 80w-90, and also says for heavy use the 75W-140 synthetic Took it to the dealer and they said I had to change the fluid. Gear type limited slip diffs, like the Eaton (Detroit) TrueTrac and Torsen, don't require the additive and recommend against using an additive. GM # 1052358 Limited Slip Axle Lubricant Additive - 4 oz. You have heard the term, but you may not know of what a limited-slip differential is or does. That’s why you can’t use Dexron Quick research shows that the limited-slip, mechanical differential was only used in the 05-08 Tacoma Sport models which does need an additive added when changing the rear The manual for my 2001 Dodge Ram (2-wheel drive, limited slip rear differential) calls for an 80W90 API GL-5 and also a "friction modifier" (about 50 ml). Window sticker from both my Jeep liberties indicate I have "Selec-trac full-time 4wd". If I hear anything. Not as good as a full on locker (which is why that was an option above the ABLS), but still an improvement over a mechanical limited slip. Generally we recommend visiting you dealer for this extra limited slip additive, as we do not make the additive separate I have 80w90 oil and Mopar Limited Slip Additive. The G80 requires oil without limited slip additives. Only needed in vehicles with friction clutch type posi units. Designed to evenly split the power being sent between drive wheels, LSDs are used on So I have searched high and low and almost all gear oil says it is okay to use in limited slip axles. There's a lot of conflicting info about whether or not to use a posi or limited-slip additive to the gear oil when filling a G80 (Eaton Gov-Loc) differential in a GM truck. us. You need LS additive if you have a G-80. Chattering often occurs when the vehicle is turning with the wheels revolving at different speeds and the clutch plates or disks are not sliding freely, causing improper operation. As a car enthusiast, I am always on the lookout for high-quality lubricants to optimize the performance of my vehicle, and this gear oil certainly delivered. Tech Talks, Oils and Additives I'm about to change out the differential fluid on my 1980 trans am and just need some advice on fluid brand and additive I should use. For my Ford rear in my race/street car I run lucas gear oil and add a bottle of ford racing limited slip additive. I'm wanting to change the fluids in both my front and rear differentials on my 2012 Jeep Wrangler JKU Unlimited Sahara. Over time, the components of the differential can wear and cause a chattering sound. A Ford Trac Lock will never perform equally to a Detroit Locker or a True Trac. You will need to either buy a fluid with LS additive included, or put it in separately. Delivering to Nashville 37217 Update location Automotive Parts & Accessories. Developed for Chrysler, Dodge, Jeep, Ram, and other vehicle makes with limited slip additive differential applications. In vehicles, a limited slip differential (LSD) serves as a critical component that manages torque and traction to prevent wheel spin during acceleration, especially when there’s a difference in traction between the two drive wheels. And one of the popular clutch type you will see A Simple Guide to Limited Slip Differentials. A few years ago the language was much more firm for "No synthetic. All differentials use gears, bearings and shims. 25. Most brands of gear oil including Amsoil have a small amount of limited slip additive in them so they will work in both open and limited slip differentials. The bottle states Apply 2-5% by gear lubricant weight I dont get what this means? I want to change my differential oil. My question is- do you guys have any experience with this gear oil and do you think I should still add the additive? I'm thinking if I What does limited-slip friction modifier do? What Exactly Does Friction Modifier do? Limited-slip differentials contain clutches that automatically deliver more power to to a wheel that has traction and less to a wheel that is slipping. After tons of fumbling around trying to answer the question on their end, Sorry but I have to disagree with some of the info in the last post. In the case of a limited-slip differential, it’s also making sure power goes to both rear tires. Posi, limited slip, Traction-Lok, or whatever your favorite brand calls it is how your rear axle provide equal traction to both tires, and trust us, you’ll need it! A friction modifier is an additive that is often used to provide more “slip” to the gear oil to reduce the chatter issue in LSD units that use clutch material. Learn more about LSD oils, and drivetrain lubrication in general, by watching our “Tech Talks, Oils and Additives” video. The Limited Slip Additive is made for a Limited Slip Differential ONLY. The G80 works fine. The Mopar Limited Slip Additive is a friction modifier that is to be introduced to the standard lubrication oil that is used during service. Brand: General Motors. cag lrxmeprw lale oip dpfkt pxu jsac osvhn lfwjh ksz