I was told that the rear cover was to be removed, all of the junk at the bottom of the diff housing was to be scooped out, rear cover and mating surface cleaned, and re sealed with RTV that is made for diff fluid exposure. The fill the same manner as described.
Our kits are based on OEM recommendations. We always suggest consulting your service manual or the vehicle owner’s manual to confirm the specific gear oil requirements for your exact vehicle application. Regarding using the recommended gear oil in Ram 1500 rear differential. From our understanding, there is some possible conflicting information with paper and digital documentation depending on the year of your truck and whose service manual recommendations you are using. Also, the country you are in may have different gear oil recommendations. The following information is for USA models only. The current recommendation for the rear differential gear oil in all 2012-2016 Ram 1500 models is going to be a 75w140 GL-5. We do offer a few 75W-140 GL-5 LS gear oils that include LS friction modifiers in the formulation. No extra additives need to be added. Regarding the 2017 and newer rear differential gear oil type. At the time of this comment, the current recommendation for all 2017-2020 Ram 1500 rear differentials is a 75w-90 GL-5 gear oil. This was the original recommendation regardless of the differential type. After 2020/2021 the original recommendations go back to identifying a specific differential type for the type of gear oil. 3.92 being 75W-140 GL-5, 3.92 tow being 80w90 GL-5, and 3.21/3.55 being 75W-90 GL-5. Note, that this is a 2019 Ram 1500 model year being used in the DIY, hence the 75W-90 GL-5 is used. Unfortunately, this might add more confusion. We always suggest consulting your service manual or the vehicle owner’s manual to confirm the specific gear oil requirements for your exact vehicle application. For all practical purposes the viscosity profiles of both the 75w-90 and 75w-140 will work for all Ram 1500 rear differentials. If you want to minimize rolling resistance for improved fuel economy, use a 75w-90 GL-5, and if you tow heavy on a regular basis use a 75w-140 GL-5.
So those with an electronic locking rear axle in 3.92 we need to use "RAVENOL Gear Oil SLS 75W-140 GL-5 LS 1L" for the rear correct? NOT the "RAVENOL Gear Oil LS 75W-90 GL-5 1L" Correct?
I have a 2017 Ram and the rear housing has a rubber plug in the rear back and was told that that is the fill area and that it is a limited slip differential Why does your instructions say different ? Other than that great instructions
The owners manual for my 2019 ram says to use SAE 75W-140 for my 3.92 anti spin differential (rwd). Does this sound right? Im just confused because i cant find any videos of someone using SAE 75W-140
Check out our Ram 1500 Differential Fluid Types blog post under the "75W140 Ram 1500 Rear Differential Fluid Type" section here for info that might help you: www.blauparts.com/blog/ram-1500-front-rear-differential-fluid-gear-oil-types.html#75w140-ram-1500-rear-differential-fluid-type
Check out our blog for detailed info on change intervals: www.blauparts.com/blog/ram-1500-front-rear-differential-fluid-gear-oil-types.html#ram-1500-differential-fluid-change-intervals
It may be an open differential, but good point it should be mentioned for those that have a limited slip. The dealer messed mine up when they didn't add the limited slip additive.
Thanks for the reminder. The gear oil used in the demonstration includes the LS limited slip friction modifier additive in its formulation and doesn't require any additional additives. Many of the gear oils we offer conveniently have the LS additives in them.
