So all I have the infamous clunking going on and have been browsing around as to the solution for a rear clunking noise. It only happens when going over bumps usually at any given speed. The sway bar and bushing have been replaced as well as megans installed.

I read someone found there sub-frame bolts were loose where would those be? Any ideas are great.

91 ls4

 

Have you checked the rear carrier bushings?

 

My rear clunk was caused by UCA's.

Carrier arm bushings (ADUS 505) are pretty common depending on how many miles you have on the vehicle. The rear strut rod bushing should be checked and most likely replaced at the same time. A symptom of rear carrier arm bushings going is a feeling like the rear end wants to come around during hard braking.

The rear sub-frame bolts, iirc, six in the rear, can be seen just by laying down on a creeper and sliding under the rear of the car. The whole cross frame for the rear differential is attached to the body via these bolts. The bushings are I'd guess 5" around or so and look like they have greek key type slots built in all around them.

If you decide to try and tighten them using a 1/2" impact air wrench, put some goggles on. All kinds of junk will come down on you. Mine didn't budge when I checked them.

 

So you say UCAs Jim do you mean the upper control arm in the front or upper carrier arm bushings?

 

The Upper control arms in the rear. Only available OEM. Complete with ball joint.

The rear carrier arm bushings...

 

question...why are the rear UCA's so much cheaper than the front ones??

 

The rear ones are made by a outfit called Armstrong Distributing, and they have their own website.

The fronts are more expensive - at least the Daizen ones are, because they're bigger and there's more of a demand for them.

 

I just did my rear carrier arm bushings.

http://www.lexls.com/tutorials/suspe...abushings.html



Mine looked like his, there was nothing left of the center mass. However, I did not buy the rear carrier arm bushings from the dealer. Mine were from MKIV Supra and they were aftermarket. You had to hammer the metal bushing out (basically lined up a socket around the same diameter and hammer the sucker out). I also used an air hammer liberally in a couple of spots to continue pushing it.

So, mine is more original factory than some, because the newer version comes with basically two giant rubber bushings that surrounds the metal bushing. Not sure how long those will last but hopefully someone here can tell us.

It's true what Jim said though. **** was falling all over. Wear goggles, not glasses!