Question about 2002 GMC Yukon XL
The OD gear is usually the 4th gear for your automatic tranny. The possible reason why you are hearing a grinding noise is because you likely have a stripped 4th clutch shaft which is very common to see. The best way to verify this is to have the car diagnosed with a scan tool and watch to see if the pcm is commanding the car to shift into 4th. If it is commanding 4th and wont physically happen it will generally not throw a trouble code. Typically any trans limp-mode type condition will go away with a key cycle and work as it should until the pcm sees a problem, but if it is a mechanical problem it will continue to exist after a key cycle such as a bad 4th clutch shaft.
Posted on May 14, 2009
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Posted on Jan 02, 2017
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