Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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there is a rear bushing as well as a bearing in the rear of transmissions that can fail especially from debris that is picked up from a bad transfer case.
The first thing I would do is change the oil/filter in the transmission and see if you get any metal in the fluid or pan. then try and see if the noise is any better.
Is this an allison or 4L80??
yes, the transmission would have to be removed and dis assembled as there is no access to removing the output shaft in the truck.
I would try servicing it first before assuming the worse.
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