Question about 1999 GMC Suburban

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1999 Suburban 4WD, Noise from the transfer case?

My 1999 Suburban has 260K miles and I bought it new. Recently it started making a noise while moving from the middle to the front of the vehicle that sounded like a sewing machine running. It is fairly loud and the noise increases and decreases with speed adjustments. Now, on the highway, at 55mph plus, a high whining noise that sounds like gears running. vehicle will go into 4 wheel low, but not 4WH. Even in low, the sewing machine noise does not go away. GMC dealer told me it was the "chain in the transfer case going" and didn't mention lubrication issues. His solution was to replace the transfer case at $2,000. If this is the case, can the transfer case be disabled by removing the chain and having the front end free wheel all the time. I no longer need 4WD capability. Sorry for the book.

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  • Docbrian Jan 07, 2009

    Thanks. I agree that $2K was too much for this vehicle and I am glad to see that you were able to do it for much less. I am not mechanically inclinded, but I do have friends that are capable (with a lift). I will look for used parts right away. Have a great new year!

  • Anonymous Mar 22, 2014

    transfer case stuck in4 wheel low.How can I get it out when I remove the transfer case motor?

  • Anonymous Mar 24, 2014

    transmission worked on donor vehicle, swapped into new vehicle and wont engage gears, thinks its in neutral, possible that the transfer case its locked up as 4x4 won't even engage either

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Your problem is similiar to mine . the web-site has been helpful. $2000.00 sounds way to much for repair on that vehicle with such high mileage. I went to a dismantler and bought a used transfer case for under $350.00. Did the labor myself with a little help. It's not too difficult if you have a some diy experience or ability. As your working on it stay with the web-site for install hints or go to autozone.com for repair diagrams.
Good luck have a good day.

Posted on Jan 07, 2009

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www.limotec.co.uk
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