Rear brak vibration

RLF9409

MEMBER
2003 PONTIAC MONTANA
6 CYL
FWD
AUTOMATIC
121,000 MILES

Rear brake vibration after new shoes, drums and hardware installed on a 2003 Pontiac Montana.

I've tried resurfacing the drums with no change. Seems to be located just on the right rear. Tried moving the LR shoes to the RR, no change.

I noticed that the shoes are exactly the same. For other vehicles I notice that the front shoe is different that the rear shoe but these are the same. Call the vendor I purchased them from and they confirmed that they are the same.

I don't think it is the drums. I switched them from RR to LR as well. Vibration still isolated to the RR. Only happens while braking. Checked the wheel bearings with no play or noise during use.

1 Reply

MHPAUTOS

MECHANIC
31,938 POSTS

This may be a shoe problem, originally you would have had a leading and a trailing shoe system, after market shoes are often the same length and they will not be radius ground to suit the drum, if you do have a specialist brake work shop nearby, take the shoes and drums in and get the shoes radius ground to suit, this ensures a perfect fit and eleminate the possibility of high sops that may cause vibration.

Mark (mhpautos)