Mystery Clunk.

Hey guys, Here's my mystery clunk.

Big slamming metal clunk (single) sound with quick acceleration.

parameters:

Not hard acceleration.. just quick...around 1500rpm
Doesn't happen with very slow start.
Doesn't happen past 20 mph.
Doesn't happen in neutral.
Doesn't happen in reverse.
Shifts from park to drive/reverse seamlessly.
Doesn't lurch between gears at all.
Clunk literally lifts and drops car from driverside wheel.
Feels like driving over a curb. Yes, a 4" curb.
Almost all likage mounts are dry rotted but everything is bolted in...or seems to be.
Extremely loud, single clunk.

Other parameters noticed. Very well could be seperate issues:
Slight vibration while driving now.
All new brakes that worked fine until this, now a slight push careens the car to the side.


Any ideas?

Maybe a rear axle control arm or control arm bushing. You didnt say what kind of car, so I am assuming it actually does have control arms.

A distant second choice could be a U-joint.

Ray

Driver side motor mount? Just throwing it out there