I'll know more tomorrow but I think that I have an engine/trans mount problem. Cruising at 55mph, throttle enough to stay in 4th, let out and thump. Back in a the throttle a little and slight thump again. Played with the throttle for a few minutes and got the thump every time in/out of throttle at many different speeds 30-70+.

I did read that it may be the center mount for the drive shaft. I do eel the vibe in the shifter. Car does have an odd vibe from time to time that comes and goes without any pattern.

Got a link to Mount thread?

Quick fix?

Thanks, Jon