Rear end hot rim to rim...

OldmanRick said

Hard to believe both axle bearings took a dump at the same time. Could the pinion spacer/sleeve lost it's preload and the R&P be generating the heat?

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I think you are in the right area here..... Guessing... It is an 8 3/4 and it is stacked too tight but since we are getting no information from the op who knows.