I noticed while accelerating briskly (but not wide open) in the interstate acceleration lane that when shifting from 2nd into 3rd gear the tranny did so with a mild but noticable thunk/bump sort of sound. Slipping drive/driven plates? Something worse? The mode selector was in Sport Shift.

 

Read thru this to see if anything sounds familier.

https://www.jaguarforums.com/forum/s...ad.php?t=49467

 

No, didn't see anything. It works fine, no problems w/the shifter commands, etc. Just the thunk in the fast lanes...