We finally tracked the https://www.jaguarforums.com/forum/x...g-sound-60533/ from underneath the car to a worn slip joint in the drive train. There is quite a bit of play in the joint. My indy shop owner mentioned taking the slip joint apart and lubing it to see if that resolved the problem.

I have been told that is a correct procedure according to Jag, and I am wondering if there is a TSB or other document outlining the procedure for my indy shop to use?

Thanks!