grabbem88

then that sounds like tranny mounts...is it underneath or behind ya...under/tranny...behind rearend/snubber control arms

randy78045

He said behind... so...

VigCS

I'm honestly not too sure, feels like it could be under me, also feels like it could be behind me...how can bad tranny mounts cause a clunk when the clutch is let out?

randy78045

your drive train flexes when it is under torque (releasing the clutch)... your rearend rotates upward... bad tranny mounts would allow movement as well...

VigCS

Hm...so so far things to check:

Tranny mounts, rear u-joint. Anything else? I'm replacing the clutch in my car next month, I guess I'll replace the tranny mounts then.

How likely is it that this problem is not related to any of internals of the rear end?

grabbem88

the only thing i can think of in the rear end is the c-clips,and a very bad bearing

VigCS

So it's most likely not that. Hopefully it'll be a tranny mount or u joint (dont think it could be anything else). Anything else to look at?

dimebag

im almost willing to bet its ur u-joint... ive seen it/heard it on countless cars... what ur describing sounds like thats what it is.

65bluestang

i think it is the u joint. if it is worn it will make that noise, y it comes from when the clutch comes out is because that is when the rotational force is applied to that part.

ttoppedaerocoupe

your u-joint has to be on its very last leg to cause a clunk though. Ill be interested to see if thats whats causing it. im sure its been said, but crawl under the car, grab your driveshaft, and try to shake it back and forth. If you have any play at all, chang your universals. was there a vibration before it started clunking? usually, or at least in the jeep world (theres a HUGE difference between wranglers and mustangs, I understand) your universals will cause a vibration before they start clunking.

alex