Sdlomi2,
Thanks for your idea - and a good one it is. I did have the rear
differential fluid changed about 10K ago, and the wrong fluid could be
a problem. I'm going back to the shop where the change was done to see
what they used. On the receipt, it just shows that the diff. was
serviced, but doesn't say with what. The shop manual only calls for
regular "SAE 80W-90" but I'll check to see what was used. Thanks again
for the idea - no one else came up with that one.