Question about 1994 GMC Yukon
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Posted on Jan 02, 2017
This rear end needs to be replace or re-built
This rear end needs to be replaced or re-built. The gears and or bearings are worn/shot. May be able to get a complete rear end from a Junk yard for much less, one in good condition. Good Luck
Posted on Dec 10, 2008
SOURCE: Front Differential Noise
There have been a large number of differentials with similar failures in the past ten or fifteen years. While many are the result of low fluid from leaks, a great number have also failed due to improper gear hardening during the manufacturing process. This usually shows up as a problem, mostly on the spider gears or spider cross-shaft. Unfortunately, metal generated internally, regardless of the source, causes scoring on all bearing surfaces, requiring a rebuild or replacement of unit (both expensive. If you decide to do this yourself, be aware that the gear ratio of the replacement MUST match the rear unit exactly!!! Any warranty remaining?
Posted on Dec 29, 2008
I had the same prob with my 2000 GMC Sierra 4x4 z71. They replaced the 4wd module in the dash and everything worked after that. Was about $200. The part itself was about $150.
Posted on May 27, 2009
SOURCE: whinning noise front front end
I have experienced whining differentials that lasted many years. Check that oil level though, but usually whining comes from bearings and/or bad alignment with the ring gear and pinion.
Posted on Jul 05, 2009
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