new bushings... new clunk. :(
 

Just replaced the stock suspesion with ST rear sway(hideous green that I spray painted) RB front sway mount reinforce bar, eibach pro springs, Pettit toe links and the 6 new pillowball bushings... before the install I would get clunk when the car would bounce up and down going in and out of the garage but that was it...
45K on the car... now after install I get this godawful clunk whenever I hit the brakes or get on the gas... any change in direction = CLUNK.
HELP!!!
I thought it might be my toes rotating in there but that dont make no sense.
Any insights???
Stock rims and tires rear toe and camber to spec.

did you do the differential mounts?

Well, there's stil a fair amount of bushings that that you didn't replace, so they could be bad... or something you just installed has some play in it.

no I did not get the diff mounts...
differential... hmmm....
explain your reasoning to me if you would.
I get that clunk when I hit the brakes also... any change in the inertia of the car leads to the clunk... I can be going 30mph and hit the brakes for an easy stop and the moment the weight/mass of the car changes vector CLUNK.

yeah I gotta get under there... makes me crazy though. get rid of one noise to uncover another. ARgggghhhhh!!!

when you accelerate the weight shifts back; slop in bushings lets the diff move backwards -> clunk

when you brake the weight shifts forward; slop in the bushings lets the diff move forward -> clunk

when you off throttle weight shifts forward; etc etc

right right. have you encountered the same problem? your reasoning is straight forward... it happens when there is a load(in gear) and when there isnt(neutral).
diff mounts, huh?

ive encounted the same problem but on a different car
its actually very common on a 240sx, and probably on any other car that has a rear differential secured with bolts and rubber bushings.

getting under there tomorrow, Sunday.
Ay yi yi.
will post what I find out.

Dum de dum dum....
 

uh... er... well, you see... yesterday when I got under there the problem jumped out at me... I forgot to tighten completely the least visible bolt on the rear lower control arm under the rotor. Dumb de dum dum...... I blame it on the beer.
**I only drink when working on the car never while driving; too easy to spill.
thanks guys... chalk this one up to loose bolts.
<---- slightly embarassed.