Front brake pads dragging
Thread Starter
Burning Brakes
Joined: Feb 2002
Posts: 871
Likes: 1
From: Union KY
Front brake pads dragging
I ran an AX event Sunday during which the ABS system was engaged several times. I didn't drive it yesterday but today noticed that my front pads were dragging slightly - as evidenced by a lot of brake dust on the wheels - as well as the fact that the front rotors were hot (not terribly) despite very light brake use driving in to the office. (The backs were warm - not hot to the touch)
I just took it out and 3-4 times applied the brakes into ABS mode in the hope that a mis positioned proportioning valve might reset itself. At least that's ther culprit I'm suspecting for now. The fluid is clean. Any other thoughts out there?
Cire
I just took it out and 3-4 times applied the brakes into ABS mode in the hope that a mis positioned proportioning valve might reset itself. At least that's ther culprit I'm suspecting for now. The fluid is clean. Any other thoughts out there?
Cire
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Originally Posted by cire96
I ran an AX event Sunday during which the ABS system was engaged several times. I didn't drive it yesterday but today noticed that my front pads were dragging slightly - as evidenced by a lot of brake dust on the wheels - as well as the fact that the front rotors were hot (not terribly) despite very light brake use driving in to the office. (The backs were warm - not hot to the touch)
I just took it out and 3-4 times applied the brakes into ABS mode in the hope that a mis positioned proportioning valve might reset itself. At least that's ther culprit I'm suspecting for now. The fluid is clean. Any other thoughts out there?
Cire
I just took it out and 3-4 times applied the brakes into ABS mode in the hope that a mis positioned proportioning valve might reset itself. At least that's ther culprit I'm suspecting for now. The fluid is clean. Any other thoughts out there?
Cire
See:
Racer
Joined: Feb 2001
Posts: 298
Likes: 1
From: San Antonio Texas
Like suggested, check the pins for proper lubrication. If the pins do have lube, then the problem lies elsewhere.
Ours is in at Fitchners having this condition fixed right now. There is a TSB out for defective brake boosters in the C5. The defective boosters will cause the brakes to drag, the pedal to not fully return when released, and/or the brake lights not going out when the pedal is released. The TSB says to replace the booster.
Now, in our case, the condition was intermittent; sometimes the brakes would be released, other times they wouldn't. You could really notice it on the highway - the car would suddenly have a funny vibration you could feel in the steering wheel. It would just appear, then disappear after a while. Hitting bumps, turning, slowing down, etc. would not trigger it nor "fix" it; you just had to ride it out.
The booster was replaced and it appeared to fix our problem. However, Fitchners is pretty thorough, so they took our car for one more test drive before we came to pick it up. The brakes were still dragging. The problem on ours is evidently in the master cylinder. The master cylinder is being replaced and we are waiting to hear if this fixes the problem.
Ours is in at Fitchners having this condition fixed right now. There is a TSB out for defective brake boosters in the C5. The defective boosters will cause the brakes to drag, the pedal to not fully return when released, and/or the brake lights not going out when the pedal is released. The TSB says to replace the booster.
Now, in our case, the condition was intermittent; sometimes the brakes would be released, other times they wouldn't. You could really notice it on the highway - the car would suddenly have a funny vibration you could feel in the steering wheel. It would just appear, then disappear after a while. Hitting bumps, turning, slowing down, etc. would not trigger it nor "fix" it; you just had to ride it out.
The booster was replaced and it appeared to fix our problem. However, Fitchners is pretty thorough, so they took our car for one more test drive before we came to pick it up. The brakes were still dragging. The problem on ours is evidently in the master cylinder. The master cylinder is being replaced and we are waiting to hear if this fixes the problem.
Thread Starter
Burning Brakes
Joined: Feb 2002
Posts: 871
Likes: 1
From: Union KY
I just talked to my Corvette technician and he said he highly suspects the power brake booster as the culprit. He also pointed out that all four brakes are likely dragging, but that the normal bias to the fronts is making the dusting more dramatic there.
Do I recall a hearing of a GM recall on this problem?
Cire
P.S. He also said the apparently easy looking R&R isn't!
Do I recall a hearing of a GM recall on this problem?
Cire
P.S. He also said the apparently easy looking R&R isn't!
Racer
Joined: Feb 2001
Posts: 298
Likes: 1
From: San Antonio Texas
Originally Posted by cire96
I just talked to my Corvette technician and he said he highly suspects the power brake booster as the culprit. He also pointed out that all four brakes are likely dragging, but that the normal bias to the fronts is making the dusting more dramatic there.
Do I recall a hearing of a GM recall on this problem?
Cire
P.S. He also said the apparently easy looking R&R isn't!
Do I recall a hearing of a GM recall on this problem?
Cire
P.S. He also said the apparently easy looking R&R isn't!
TSB # 01-05-22-002
Document ID # 791053
Don't know about the R&R process..... you'd have to ask Fichtners about that.
