I have a REALLY LOUD squeak coming from the rear of the car. It sounds like rubber rubbing against metal. It only happens when I go over speed bumps and is coming from the right rear side of the car. At first I thought it was my new panhard rod, but the bushings are all greased and the nuts are all tight. I don't think it's the poly swaybar endlinks, I had those put in last year to solve a squeak I had back then. I did have a set of Bilstein HD's and WS6 springs installed a couple weeks ago. Could the spring somehow not be sitting right in the spring perch or something of that nature?

I'm going to remove the spare tire and jack to see if they are causing any noises since they are in that general area.

This is really bugging me

 

One thing you can do is have a friend stand in the trunk and sorta jump to make the suspension squeek... while you go under and listen for it.

 

AAAAAAARRRRGGGGGGHHHHHHH!!!!!! I can't find where this god forsaken squeak is coming from! It only occurs when I'm slowly going over a speedbump through a plaza, and it's really loud. It also happens from time to time if I got over a bump on the road at a certain speed, but rarely since road bumps don't have the up/down shape of a speedbump.

I removed my spare and jack to see if it was that, it wasn't. Now, I took my car to my mechanic to replace a bad valve stem, and had him look at the rear suspension while the car was in the air. They found one thing. The adjustable jamnut on the Hotchkis panhard rod kept coming loose due to it being a little large, so they grounded down the mount on the chassis side a little to make some room for it. Well, that wasn't making that squeak noise.

Also, I had Spohn LCA's with poly bushings and poly rear swaybar endlinks installed last year, keeping the stock rubber swaybar bushings. They where installed using a drive-on lift. The stock swaybar endlinks squeaked at first, but I replaced those with the poly ones and the noise went away.

Fast forward to a couple weeks ago when I had the WS6 springs and Bilstein shock installed. That's when the loud squeak started. I had him use the isolator pads that came with the springs [bought them used], so they should be the stock pads from the WS6 they came off of. But I also still have the stock springs and pads from my car. Would greasing the pads do anything, or would that be a bad thing?

My mechanic agreed to take a look at the spring when I get time to take my car their next week. He also said if it comes down to it, he'll just check every damn bolt and tighten everything down.

I just had my 17" wheels installed last week with 275/40/17 Firestone Firehawk Wide Oval tires [awesome awesome tires btw]. Could the tires be rubbing somewhere causing the noise? I don't see how, since I'm running on factory WS6 wheels and not aftermarket. But still, thousands of people are running those size wheels and tires, and even bigger without problems. And the squeak was happening before the tires where installed when I had the factory 16" wheels with 245/50/16 Goodyear RSA's.

I have one last question. Could a bad shock be causing the squeak? I bought the Bilstein shocks brand new from Summit Racing, so I don't think they could be bad.

I'll tell my mechanic to recheck the LCA bolts, endlink bolts, and swaybar mounts.

Please help

 

Its really hard to tell what it is over the net. I'll go for a ride if its driving you that crazy. Let me know.

-Dustin-

 

If you dont adjust your panhard correctly, the rear tires will dig into the wheelwells. Look behind the tires. Especially true if you have wider tires. Readjust and if that doesn't work, dimple the wheelwells with a ballpeen hammer. around where ir scrubs, mist a light coat of black paint and try again until the noise goes away.

Gad the exact same problem. If you're lowered, you can't use the same length as the stock panhard, and some dont come right out of the box anyway.

 

Once upon a time, I had a squeak coming from the back whenever I would slowly go over a speed bump. Since the car was still under warranty, I brought it to the dealer.

Strangely, they found that the culprit was the exhaust hanger.

 

I'd check the jack/spare tire unit too, just to make sure it's all tightly stowed.

-John

 

True. Or if you have lower control arms on it, you need to make sure you lubed the polyurethane bushing right, or they'll squeak too.

 

Its the rear brake caliper. Either the rotor is rubbing the caliper bracket or the inner pad is shifting within the caliper bracket.

Drive your car with the e-brake slightly on over rough road. If the squeak is gone it what I stated above.