Squeaking and vibration

[another_newfie]

This past weekend I replaced the rear shoes and wheel cynlinders on our 02 Taurus SEL. That all seems to be functioning fine.

While doing the job I also checked the front brakes, I popped the calipers off and examined the pads and there are lots of pad left on each side so they appear to be fine.

After buttoning everything up and driving it, we can hear a reasonably loud 'squeak' from the driver side front wheel. The squeaking sound speeds up as the car goes faster. If I hit the breaks (even somewhat gently) it stops right away. As soon as I release the brakes it starts again. I also noticed at highway speeds (right at 95km/h to 100km/h) if I take my foot off the throttle and coast the car bumps, I can't really tell if it coming from the front or not. The squeaking definitely is coming from the front though.

I'll pull the wheel tonight when I get home from work and see if I can determine what is going on, but in the meantime does anyone have any ideas as to the potential cause?

[dbeach84]

Had this happen on a different car and it was due to not greasing the caliper screws. By removing the calipers you've likely changed their position slightly. It could be that that now something, likely the edge of the pad, is now making contact with the rotor. Try removing and reinstalling the calipers again.

[another_newfie]

Thanks dbeach84, I appreciate the advice. I'll do that.

[another_newfie]

Tonight I popped both fronts and had a look. Everything looks fine. I see no evidence of scraping, nor any evidence of any cause of the squeaking. Both the wife and I drove the car with windows open trying to locate the source of the squeak after buttoning it back up (yes it's still there) but we weren't able to 100% tell which wheel it is coming from.

We believe it's coming from the rears. Hard to tell though. Tomorrow night I'll pull both rears and take a peek.

Bloody annoying.

[maggie]

Did you clean & regrease the caliper pins?

[another_newfie]

Originally Posted by maggie

Did you clean & regrease the caliper pins?

Yes I did.

This morning on the drive into work the car was silent. Despite after putting everything back together last night after checking the fronts again and the noise still being there. .

No idea at this point, I will double check the rears tonight to be 100% sure there is nothing re-assembled wrong.

[another_newfie]

Well it appears it's all dealt with. I tore down the rears again tonight and while everything was all together properly, I hadn't tightened up the adjusters enough and I think there was too much slop in the drums. I believe they might have been rubbing. I also cleaned everything to within an inch of it's life with brake cleaner and buttoned it all up.

Still a little bit of a squeak, but the pedal is back to where it should be and for now I'll leave it be.

[Architect]

The squaking is caused by the driving itself, right? Not by the car moving up and down, like you do with "testing" the shocks?

[fct]

I had exactly this problem after doing my last brake job. A kind of a rubbing/knocking noise coming from front right side as car gets moving at speeds of 20-45mph, but stops when I apply brakes. It turned out that there was nothing wrong with the brake job. The passenger wheel lug nuts werer not tight enough.

[another_newfie]

It is definitely not a knocking type sounds, it's clearly a metal to metal squeaking. It also 100% stops as soon as you depress the brake pedal.

Lug nuts are torqued to spec, so it isn't that.

Architect, yes the squeaking happens when driving. It won't happen right away, the brakes have to heat up a little first.

It isn't getting worse according to the wife (it's her daily driver), nor is it getting much better either.