Hi Chuck, You are correct the U-Joints will usually show wear fore and aft. Generally you hold / lock one end of the shaft and then move the other end fore and aft to look for play. I see no reason this could not be done by jacking up the wheel to do it, but our sense of feel in our hands is important too. If it feels good at the wheel also check it at the shaft by hand (and eye). I must say the best way is to have it off the car. A U-Joint can be tight fore and aft but yet feel "clickie" when mover around from being dry or rusty. Larry (never been in the joint) - Cleveland -----Original Message----- From: DeTomaso [mailto:detomaso-bounces@server.detomasolist.com] On Behalf Of Charles Engles Sent: Tuesday, June 07, 2016 10:33 PM To: detomaso@server.detomasolist.com Subject: [DeTomaso] Techno Question: How to check U joints integrity? Dear Forum, The issue of loose or not U joints has come up. The C clips and paint are intact without bare metal showing. I can't remember the simple drill that, I think, begins with jacking up the rear of the Pantera and then..rotating the wheel back and forth??? Clarification is welcome. Warmest regards, Chuck Engles