Should I be concerned with a slight rear end noise which only occurs when I let off of the gas while at highway speeds? I would guess that is the pinion bearing. The dealer mechanic says that he does not hear anything. He did change the diff. fluid, though. The noise is still there. I'm just about out of warranty. However, if this is no big issue, I'd rather not have anyone open up the differential unless really needed. I might add that most people probably would not even notice the noise.

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Paul 1987 300 SDL; 2000 ML; '69 MGB; '68 VW Fastback