I think the 56 may have the "Detroit" U-joints. If so, these are identical to the senior Packard Ultramatic U-joints, which have been unavailable for years. If this is the problem with Mr. Emory's car, he is probably going to have to have the car converted to a modern driveline. There are a couple of national chains that do this, and they do it very well, but you have to drive the car in or have it towed. Driveline Services is one I have used for a couple of my Packards; they do a superb job, and once converted, you don't have this problem any more. The U-joint I refer to is called a "Cross and Trunion" type joint. Rodger's post is correct if the car has the common "X" type U-joint. Dick Benjamin (not an expert, but I've learnt much at my father's knee, and other low joints over the years). ----- Original Message ----- From: <FltSgt@xxxxxxx> > U-joints can be found at any NAPA or the likes parts store > Rodger & Gabby