interesting... thanks for your input. I had the driveshaft shortened and balanced and they did some other work on it... total came to $200 bucks and it was painted and looked like new. They had my same u-joints and tongue on it... said they were ok.
I was wondering if I ought to replace the rear u-joint anyways... they're not expensive. But what do you mean by "not centered in the rear end yoke"?
