Concerning my mysterious vibration:   I replaced the fuel filter (nope!)...I replaced the spark plugs (nope!) motor/engine mount (nope!)...I replaced the exhaust system (nope!)....replaced the Tranny crossmember (nope!)....replaced the Tranny rubber mount(nope!).....raised the Tranny up higher (nope!).replaced the rear U-joint (nope!)......Had the rear yoke replaced WITH new U-joint AND the drive shaft STRAIGHTENED and balanced(ding-ding-ding!) Money-shot!!!!
Ding-Dong-the-witch (with a B)-is-DEAD!!!! NO MO vibration!!   Car hasn't felt this good in a LONG while!! Fun to drive it again. My confidence is slowly starting to build in it again. 
6sal6

Drove it down to the garage (guy lets me use the lift on Saturdays!) to weld an exhaust leak; about a mile maybe.  Started vibrating  JUST LIKE BEFORE!
Upon examination the rear u-joint was "eat-slap-up" JUST LIKE BEFORE! 

........(short version).....The C-clip/lock clip thingy on the u-joint was  interfering with the rear yoke.  Quick call to Glen Busek (mustang rebuilder/restorer extraordinaire) who sez....."you don't need them friggen-clips, $hitcan'em"  "We don't us'em because the yoke holds the joint in place"! 
FIXED-IT!!
My question is........why'd they putt'em on the joint if you don't need'em??!
3 u-joints later!!!!!
'Nuther question.... wonder why the release bearing is SUPPOSE to spin all the time on a T-5 set up?? Only make sense it will wear out quicker!!
The thrash continues!!
6sally6

Last edited by 6sally6 (2/29/2020 8:31 PM)