1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

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: 1,288

    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: 6,078

    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.''