Forum Discussion

Explorer

Nov 06, 2015

P-30 Brake Squeal

My 1994 P30 chassis M/H has always been fussy regarding brake squeal. I bought this M/H new and have over 220,000 miles on it. Found from experience that only Delco (GM) pads would not squeal. Now have a bad squeal from L/R brake coming to stop. Six months ago the pads,rotors, calipers and hoses were replaced in the rear by a very reputable truck shop (I'm getting to creaky to do this stuff myself like I always used to). Recently this bad squeal developed. The shop that did the work last spring replaced the rear pads again. They didn't find anything on the L/R brake suspicious. The squeak is reduced, but still happens. It takes a half hour of stop and go driving to get things hot enough for the noise to occur when coming to a stop.

Any thoughts or experiences that might help would sure be appreciated.

Class A

16 Replies

Dr_Quick
Explorer II
Nov 06, 2015
One thing that you could try, if it has not been done. They make a lubricant that goes on the back side of the pads between the caliper piston and the out side where the outer pad sits. I have know this to help with a squealing sound.
enblethen
Nomad
Nov 06, 2015
Another issue I had, was not the proper lube used on the slide locations on the calipers.
More_To_See
Explorer
Nov 06, 2015
I would be interested in knowing the temperature of the rotors between the two sides since you say the squeal starts after it has had time to heat up.
enblethen
Nomad
Nov 06, 2015
What kind of pads?
Did they check the new rotors?
Bill_Carry
Explorer
Nov 06, 2015
Yes, the hoses were replaced as well as the pads,rotors, calipers, fluid, etc.
enblethen
Nomad
Nov 06, 2015
Have the rubber lines been replaced? I had restrictions that caused squealing. It was on the front.
Many companies making pads have changed their formula for the pads. I have only used ceramic pads. The organic and semi-metallics would not last.
Have they flushed the fluid?
Were the rotors turned? If they replaced the rotors were they checked for warpage?