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Help with an axle on a 1990 GMC K3500

Discussion in 'Truck & Equipment Repair' started by dcstewart77, Nov 12, 2007.

  1. dcstewart77

    dcstewart77 Junior Member
    Messages: 1

    Hoping someone here might be able to help…I have a 1990 GMC K3500 1-ton 4x4 dump that I need to either rebuild the axle or find a used one.
    The truck died in the yard yesterday while trying to move some firewood around. Jacking up both rear wheels they will turn forward, but not back…and when turning forward the driveshaft is not always spinning. I can hold the driveshaft still and the wheels will still turn. I haven't pulled the differential cover yet, but I'm assuming something bad happened in there :-(

    I bought the truck cheap and have used for plowing my own driveway for the last 2 years. It doesn't owe me much, but it's in rough shape so spending $800+??? to rebuild the axle is not the best option.

    First how do I identify what axle it currently has? (It's the "new" style cab with the straight frame in the rear (it's not a pick up dually). The differential cover has 14 bolts.)

    Second where should I hunt for a used axle? Are there any good junk yards in New England (I'm in NH) that I should check?

    Thanks in advance,

  2. Zippy

    Zippy Junior Member
    Messages: 23

    That is a GM 14 bolt rear. They are pretty easy to rebuild. Most likely you have a bearing or 2 or 3 that gave out. The pinion on those axles comes out in a carriage which makes setup for preload really easy. There are no shims for setup on the carrier either. It uses adjusters.

    Here are a couple articles from pirate4x4.com that will give you all the information you need to know to set one up.




    Hope this helps. I was quoted $1000 for a used axle. I bought a shop press and bearing kit for under $250 and rebuilt mine.