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Front diff problems....

Discussion in 'General Chevy & GM Tech Questions' started by bobby70ny, Dec 20, 2008.

  1. bobby70ny

    bobby70ny New Member

    New to this site. I have a problem with my front differential.....began when i changed my tires from stock to larger rims and tires with a different offset. Is it possible that this is the cause for my front differential going? I drive a 99 Suburban.
  2. retired

    retired Rockstar 100 Posts

    So what is the problem your having?
  3. bobby70ny

    bobby70ny New Member

    Problem is grinding constantly, i've changed the fluid already and there was metal in the fluid....I'm really wondering if the new tires/rims caused this.... thanks for any input.
  4. Springthing

    Springthing Epic Member 5+ Years 1000 Posts

    Any possibility the 4WD is engaged and/or has not disengaged from a previous 4wd trip/excursion?
  5. MrShorty

    MrShorty Epic Member Staff Member 5+ Years 1000 Posts

    How much bigger are the tires (overall diameter)? Can I assume a half-ton Suburban? The 8.25 IFS in the half ton suburbans is a pretty weak differential, and really big tires could cause problems. Of course, I've heard of several people who have trouble with that diff with stock tires, too.
  6. tbplus10

    tbplus10 Epic Member Staff Member 5+ Years 5000 Posts Platinum Contributor

    Probably not the cause, usually larger tires will cause diff gears and pinions to chunk into pieces. This sounds like the bearings are going or the gears arent riding right and flaking off. About like normal wear for high mileage.
  7. bobby70ny

    bobby70ny New Member

    Thanks, i'm getting everything changed tommorrow, trucks in great shape otherwise....just wasn't sure if I should consider changing the rims/tires again.....

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