That's why I +1 Flocko's comment about bounce testing. If the car is cold, just walk up to it and bounce test. If it squeaks, it's bushings. If you have to be driving it to replicate the sound, then yeah, I'd say brakes.

 

Yea I know about the rear knuckle problem I had that problem on my last gs300 but it didn't make a noise. I doubt it's the problem it feels more like a brake or wheel problem as it makes the sound ima fashion similar to mattress squeaking sounding like it happens every time the wheel spins but I could be wrong. Funny I never noticed it until changing the rear strut mounts. Could the mechanic have messed something up?

 

Did you bounce test yet??

 

Yup. Didn't hear anything. I really feel like it might be brake related. Are there any ways to check for seized calipers. Rear rotors and pads were just change few thousand miles ago

 

No easy way I know of to check the brakes, other than pulling wheels and calipers off and examining them.

You might try posting up in the maintenance sub forum. Mitsuguy is the mod there, and he's a mechanic. He'd probably know.

 

if your brakepads are used or near end of life, cut your losses and just bite the bullet, and do a front brake job. Replace rotors/pads AND hardware (clips) and tell your mechanic to be sure to grease up the caliper pins.
My money is this will clear up your problem for the ~$150-200 or so depending on your labor charges.

If your brakes are new, then yes, you need to troubleshoot if further.

 

The brakes are actually new but meanwhile they are making squeaking Noises when I press them. I just got them done less then 10k miles ago but when they(rear rotors and pads) were new the fronts were bad so could I have prematurely worn the rear pads by making them work extra hard to compensate for the weak front pads. Because now that I think about it the brakes themselves make noise when I press them so I'm guessing the rear pads are done already. Could the noise be from the worn rear pads? I don't see how they would make noise while I'm cruising if I'm not pressing them at all because aren't the pads not supposed to be touching the rotors unless I press the brake?

 

Now I've officially confirmed the noise completely goes away with even tapping the brake lightly so it's definitely a brake issue. Now the question is when I replaced the pads the mechanic did the brake pins that I got from Sewell. Could it be he installed them wrong because I've never heard of brake pads doing this wen driving.

 

Doubt they were installed "wrong" probably just needs lubing, that or the back of the pads need some anti-squeal grease.

Either way a quick disassemble and lube should fix it.

 

I'm gonna try and replace the rear pads and see what happens. But is it possible for pads to be causing a noise without even pressing the brakes. It happens when I'm coasting like 10-40 mph

 

yes, when brakes are disengaged there isn't a huge spring action that forces them apart like your bicycle brakes. They barely are floating on the disc. If something is sticky or just a bad combo it can cause contact, especially as you noted when brakes are cold.

You have a brake problem. If you want to get rid of the noise, focus on your brakes. If it doesnt' bother you maybe you are fine. If you notice uneven brake pad wear or your car is pulling, then likely a caliper is dragging. If it gets to the stage where it makes a big grinding noise on braking then you've hit the wear clips on the brake pad.

That being said, my akebono proact brakes always squeak on first brake application too on a cold start. If I don't brake, sometimes i hear a little squeal on the first few rotations from the slight imperfections floating/touching. But it's quiet after my first brake.

 

So if I take off the pads and the pads are worn more on one side then the other your saying that means I have sticky calipers?

 

I need to replace the lower bushing on the RR spindle on a 98 ES300. Part number is 42304...on my schematic. It is the bushing that is on the bottom of the spindle were 48780A attaches to the spindle.
Where can I get a replacement bushing?
Anybody got a "how to" to replace it?

 

Sounds like it could be the caliper slide pin is not lubed.

 

I can only guess ebay, or that New Zealand shop might have what you need. Might have better luck posting your request on the ES forum, or maybe the maintenance forum.

Although there is a DIY in the 2GS suspension forum with pics that'll give you a general idea how do to it on your ES.