I have an '81 Porsche 924, and the rear end is no longer doing what it should.

Long story short, I don't have the time or resources to get this thing going again and I was wondering if anybody knew of a semi-decent shop in Newport News (local for towing sake) to diagnose the possible faulty axle or diff... possibly drive shaft, and fix said problem.

So where can I go with it? Big Al's is very close but they only do FWD.