Rear drum grinding??????
Thread Starter
Racer
Joined: Jan 2007
Posts: 274
Likes: 0
From: Litchfield NH
Rear drum grinding??????
has this happened to anyone else. when im driving i can hear a pulsing grinding noise coming from the rear brakes that speeds up as i go faster. If i pull the e-brake up a little bit it turns into a constant grinding noise. does anyone know if i need new rotors or a new drum lining??? it looks like i have plenty of lining left but i dont know. maybe i need to get the rotors resurfaced? thanks!!!
Guest
Posts: n/a
First off they are rotors not drum brakes. I would check the rear brake pads, usually there is a wear indicator in the form of a metal finger that sticks out and makes contact with the rotor to make a metallic noise indicating the pads are worn. If it has gone that far you will need to replace the rear brake pads and have the rotors resurfaced (have them turned at a machine shop).
If it's pulsing, that usually indicates that the rear rotor is warped and can either be turned or may need to be replaced.
Good Luck
Dave
If it's pulsing, that usually indicates that the rear rotor is warped and can either be turned or may need to be replaced.
Good Luck
Dave
Last edited by Warnberg; Jul 18, 2007 at 10:09 AM.
Pro
Joined: Oct 2004
Posts: 653
Likes: 0
From: Baltimore Maryland
has this happened to anyone else. when im driving i can hear a pulsing grinding noise coming from the rear brakes that speeds up as i go faster. If i pull the e-brake up a little bit it turns into a constant grinding noise. does anyone know if i need new rotors or a new drum lining??? it looks like i have plenty of lining left but i dont know. maybe i need to get the rotors resurfaced? thanks!!!
just kidding there pads / and rotors,... rotors wont produce a sound they will just get warped and cause vibration. change the pads and resurface the rotors at the same time, so you have a fresh slab of steel to start those new pads on ... good luck!
Instructor
Joined: Apr 2007
Posts: 222
Likes: 0
From: Tunkhannock PA
Drums and rotors both in the rear,.. damn that car must stop on a dime and pick that sh*t right up! haha
just kidding there pads / and rotors,... rotors wont produce a sound they will just get warped and cause vibration. change the pads and resurface the rotors at the same time, so you have a fresh slab of steel to start those new pads on ... good luck!
just kidding there pads / and rotors,... rotors wont produce a sound they will just get warped and cause vibration. change the pads and resurface the rotors at the same time, so you have a fresh slab of steel to start those new pads on ... good luck!
Go get the brakes checked out. If you are hearing a constant grinding, chances are the rotor is already junk.
My guess without seeing it is bad caliper. Fix will be rotor, pads, caliper.
Thread Starter
Racer
Joined: Jan 2007
Posts: 274
Likes: 0
From: Litchfield NH
alright maybe i didnt use the right terminology. but there are two parts to the rotor and two sets of pads. There are brake pads that put pressure on the outsides of the disc when you brake....but there is also a different set of *shoes* that act like a drum brake when u pull the e-brake. These shoes rub on the inside of the rotor (its a circle) and it expands when u pull the e-brake. the e-brake doesnt work the rear calipers. the sound is not coming from the brake pads its coming from the shoes rubbing against the inside part of the rotor(the e-brake)
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Last edited by 04DevilR1; Jul 18, 2007 at 10:30 AM. Reason: picture
Racer
Joined: Apr 2007
Posts: 326
Likes: 0
From: Ashburn Virginia
alright maybe i didnt use the right terminology. but there are two parts to the rotor and two sets of pads. There are brake pads that put pressure on the outsides of the disc when you brake....but there is also a different set of *shoes* that act like a drum brake when u pull the e-brake. These shoes rub on the inside of the rotor (its a circle) and it expands when u pull the e-brake. the e-brake doesnt work the rear calipers. the sound is not coming from the brake pads its coming from the shoes rubbing against the inside part of the rotor(the e-brake)
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Instructor
Joined: Apr 2007
Posts: 222
Likes: 0
From: Tunkhannock PA
My Expedition had the same problem time to time (had the same ebrake set up)I just got up to about 60 mph and put the ebrake on about 1/2 strength for a few seconds (keep button in so brake doesnt click to engage). It would remove the built up crap inside the drum/rotor. Maybe someone more familiar with the corvette set up will chime in if this "fix" works for the vettes also. If that doesnt work its possible the wheel cylinder is hanging up, not fully releasing the pads.
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
alright maybe i didnt use the right terminology. but there are two parts to the rotor and two sets of pads. There are brake pads that put pressure on the outsides of the disc when you brake....but there is also a different set of *shoes* that act like a drum brake when u pull the e-brake. These shoes rub on the inside of the rotor (its a circle) and it expands when u pull the e-brake. the e-brake doesnt work the rear calipers. the sound is not coming from the brake pads its coming from the shoes rubbing against the inside part of the rotor(the e-brake)
Pro
Joined: May 2005
Posts: 697
Likes: 50
From: Up North Wisconsin
My Silverado will do the same thing. It is a build up of crud and and the rotor was getting rusty. Clean it up and fry it once in a while. should be good to go. Funny how the mechanically challenged were so quick to beat you up.
Last edited by 00247; Jul 18, 2007 at 05:11 PM.
