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  1. R

    Rear gear oil

    I ended up using Valvoline 75w-140 and I added 4 ounces of the mopar friction modifier. It looks like the valvoline had friction modifier already in it but it didn't match the requirements from the manual. I used a lubelocker instead of rtv. I have lubelocker gaskets on the front and rear...
  2. R

    Rear gear oil

    Try this website with your vin https://fcacommunity.force.com/RAM/s/equipment-listing
  3. R

    Rear gear oil

    I recently purchased a 2wd 2010 1500 and I'd like to change the diff fluid. According to the build sheet for my VIN I have the 3.92 with anti-spin. So the manual calls for Mopar 75w-140 and the Mopar friction modifier. I believe there are other oil brands such as redline, Valvoline, amsoil...
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