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rear diff oil with eaton (G80) diff.

Discussion in 'Chevy Trucks' started by 00bluegtp, Apr 12, 2011.

  1. 00bluegtp

    00bluegtp Member
    Messages: 71

    I am going to change all my fluids in my truck and i am wondering what goes into the rear diff with the G80 rpo code. thank you for your help.
  2. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,214

    Synthetic 75W-90
  3. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    If the truck is used primarily for hauling or towing heavy loads you can use synthetic 75w-140 for extra protection.
  4. Triple L

    Triple L PlowSite Fanatic
    from Canada
    Messages: 5,973

    May as well throw the GM locking dif additive in there as well
  5. Holland

    Holland Senior Member
    Messages: 605

    75w-90 synthetic front and rear with the friction modifier in the rear. (as already stated)
  6. 00bluegtp

    00bluegtp Member
    Messages: 71

    anyone know how much the front and rear diff take?
  7. tuney443

    tuney443 PlowSite.com Addict
    Messages: 1,847

    2 qts. front,4 qts. rear.If you run the correct lube,as already stated,there is no need for any additives. Like Ragu tomato sauce------''It's in there.''