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Thread: G80 swap into open diff

  1. #1
    Join Date
    May 2008
    Location
    Saskatoon, Sk
    Posts
    20

    Default G80 swap into open diff

    1997 Z71 with G80 diff piled up pinion bearing on the highway. Yoke pretty much welded in and am assuming it is hooped, and maybe the housing is too. I have a complete housing with open diff from same year and model. Can I just swap in the G80 using the pinion that is in the open diff? Thanks
    1994 Chev 1500, 4x4, 6.5NA, 180,000 miles
    Stock....... for now
    1991 GMC 2500, 2wd, 6.2, 350,000 (30k on engine)
    Soon to be a parts donor
    1993 GMC 2500, 4x4, 6.5T, 225,000 miles. A work in progress

  2. #2
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,573

    Arrow

    The parts will fit, but a mis-matched gear set won't work. Why not swap the complete axles?
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
    Join Date
    May 2008
    Location
    Saskatoon, Sk
    Posts
    20

    Default

    That's what I was originally thinking, but I do like the G80 in the winter(which only lasts for 6 months up here). Just wondering if the pinion in the open diff will be compatible with the G80. Both have 3.42 ratios
    1994 Chev 1500, 4x4, 6.5NA, 180,000 miles
    Stock....... for now
    1991 GMC 2500, 2wd, 6.2, 350,000 (30k on engine)
    Soon to be a parts donor
    1993 GMC 2500, 4x4, 6.5T, 225,000 miles. A work in progress

  4. #4
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,573

    Arrow

    The open diff gear set, if it's good, will fit onto the locker carrier. Essentially, you'll salvage the carrier and whatever other good parts you need from the bad axle (except the bearings). If you've never built a rear end (successfully), you'll need a shop to do the gear set-up. I also suggest all new bearings and seals while you're at it (cheap insurance).
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

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