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Re: 12 bolt rear diff inspection ?
It,s a whine like no oil in the diff. and hits 30 mph and screams in the truck and then goes away at 32 mph. I hit a local garage who I see has a hot rod and he did the stethoscope on the the tire bearings and said not bad but some wearing. rear sounded not bad in the air with the rear running but he said these things are like a tin can for resonating.
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