Question about 2005 GMC Envoy
When i am in a4wd or 4hi the power stays in the back tires and spins on snowy roads.
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Posted on Jan 02, 2017
GM has had more that their fair share of transfer case problems. I have also seen may problems caused by addition of aftermarket equipment - especially remote starters. There is a good chance that you have a damaged transfer case, but if an electrical problem was the root cause of the damage, you will only destroy a new transfer case if the electrical problem is not resolved. If the mechanic that you are going to does not have the proper equipment and/or information to diagnose your transfer case control circuits, you should consider getting a second opinion from the dealer before buying a new transfer case. I currently work in an aftermarket shop. There are several of the GM 4 wheel drive systems where the manufacturer has not released the information necessary for an aftermarket shop to properly diagnose and repair the system. Some mechanics are simply to proud to say "I can't" or "I don't know".
Posted on Jan 22, 2011
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SOURCE: 1999 GMC Sierra 4WD -
The most common problem with this is the clutch packs in the transfer case, they sound like like are not locking up the front diffs properly and may need to be adjusted or replaced.
You need to do a pressure test of the fluid transfer section to ensure that there is the correct pressure to engage the clutch packs then if thats ok start to look at adjusting these.
Let me know if you need more infromation.
Posted on Sep 01, 2010
it is normal if u get tire spin in 4wheel or in all[a4wd]-- even auto[4wd] uses the rear spin to engage the front differential
Posted on Dec 22, 2009
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