Hmmm. I also wonder about the u-joint area-specifically the bolt/washer holding the joint to the trans output shaft. If that backs out it sounds like Hell and vibrates badly. Been there!
Terry
__________________
"It don't take but country smarts to solve the problem" (Smokey Yunick)
'41 Merc Town Sedan / 260" 8CM engine
'66 Fairlane four door / "warmed up"
302