Peter, the diff mounts do seem to be shot. I can tell just by looking at the rubber which is torn and pieces are coming out. That's the first thing I'll have my shop replace. I'll also tell them to inspect the entire suspension. I already looked at the rear right suspension and couldn't see anything else wrong. I'll look at the left rear today.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL