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Front Diff Swap

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Boonduff, Feb 10, 2012.

  1. Boonduff

    Boonduff Member 3 Years 100 Posts

    This morning I noticed drops of gear oil on the driveway. Climbed underneath, and saw several small hairline cracks in my front diff housing. My neighbor has a 1996 K2500 Suburban with a 5.7L sitting in his backyard. It has the same 3.73s as my Suburban. I know 1ton trucks use a bigger 9.2in ring gear, but will the 3/4 ton Suburban front diff swap in place of my damaged one? FYI, mine is a 1997 K1500 with a 5.7L.
  2. Joeairforce

    Joeairforce Epic Member 5+ Years 100 Posts

    Front diff should be the same.... It's usually just the rear axle that's a different size...
  3. MrShorty

    MrShorty Epic Member Staff Member 5+ Years 1000 Posts

    Actually, Joeairforce, the front diff on a 2500 is a 9.25, where the 1500 use an 8.25 inch front diff.

    Most discussions I've seen on this question suggest that there isn't quite enough room under the 1500 for the 9.25 inch front end.
  4. Joeairforce

    Joeairforce Epic Member 5+ Years 100 Posts

    Learn somethin new every day.... :great:
  5. Pikey

    Pikey Active Member Staff Member 2 Years ROTM Winner 1000 Posts

    Are you sure that it is cracked? My 95 has looked like that since it was new. It never leaks. I assumed that it was from the casting process.
  6. ahm1127

    ahm1127 Rockstar 100 Posts

    Make some measurements of the casings & measure where they mount up. Clean yours up & see where its leaking from, Pikey is right!
  7. Pikey

    Pikey Active Member Staff Member 2 Years ROTM Winner 1000 Posts

    I did have a leak one time. It was where the case comes together. I pulled it, split it, and sealed it. All is good.
  8. Boonduff

    Boonduff Member 3 Years 100 Posts

    Thanks for the replies, but its diffently cracked. So it's off to the junkyard I go.
  9. ahm1127

    ahm1127 Rockstar 100 Posts

    Did you measure them to see if it will work?
  10. Boonduff

    Boonduff Member 3 Years 100 Posts

    Not yet. I'm gonna go to my local Pick-A-Part this weekend, gonna do my measuring there. I wanna see if the K2500 Subs that had the smaller 14 bolt rearend used the same front diff as the ones with the FF 14 bolt. I'll let you know what I find.

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