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Old 09-04-2019, 04:24 PM   #4 (permalink)
davester
Diesel Prodigy
 
Join Date: May 2015
Location: Canada
Posts: 4,393

Chock the wheels, lift one of the rear wheels up, pop the diff cover off, stick it in neutral and see how the diff gears look while spinning the wheels in each direction.
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2004 GMC Sierra 3500 C&C, added 4WD, 6.0L gas, Extended Cab, SLE, Transgo 4L80e-HD2 kit installed
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