C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

"96 w/frt. brake prob.

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Old Jan 14, 2006 | 09:54 PM
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Default "96 w/frt. brake prob.

When I step on the brakes it sounds as if the pads are steel to steel w/ the rotor. I checked the pads & they were OK. I noticed that the caliper hsg. on driver side seems to be rubbing on the rim. Almost no clearance between hsg. & rim on drivers side but approx. 1/4 in. on pass. side. Free travel of caliper hsg. on both sides seem to be equal. Rotated wheels and no interference or noise from wheel bearing. What would cause driver side to drop, or pivot towards rim when braking? Any help would be appreciated. Thanks, MiMitch
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Old Jan 14, 2006 | 11:08 PM
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I had a similar problem on the right rear where the caliper housing seemed to be wearing a groove in the disk... replacing the wheel bearing completely solved what seemed to be a clearence problem.
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Old Jan 15, 2006 | 08:31 AM
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Originally Posted by Mr. Peabody
I had a similar problem on the right rear where the caliper housing seemed to be wearing a groove in the disk... replacing the wheel bearing completely solved what seemed to be a clearence problem.
The rotor and pads are fine and there is no play/noise in the wheel bearing. It appears that under braking the caliper housing/bracket is rubbing against the alum. wheel. I've pulled the caliper hsg. off and re-assembled it and still have the same problem. I didn't notice anything bent or broken. I'm at a loss as to what the problem could be. I don't see how the driver side caliper housing can have intreference and not the pass. side when both appear to be in there proper position.
Thanks for your suggestion, MiMitch
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Old Jan 15, 2006 | 05:07 PM
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First thing I would do is swap the front wheels from side to side. Maybe you have an aftermarket wheel on the drivers side and the clearance is different.

Only other thing I could think of is the bracket that mounts the caliper to the knuckle is moving under load?
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Old Jan 16, 2006 | 08:12 AM
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Originally Posted by JCAIRE2
First thing I would do is swap the front wheels from side to side. Maybe you have an aftermarket wheel on the drivers side and the clearance is different.

Only other thing I could think of is the bracket that mounts the caliper to the knuckle is moving under load?
The grinding noise only began about a week ago or less. The noise,like I said sounds as if the pads are bare and rubbing against the rotor. I removed the pads and they are OK. The caliper bracket is tight and the "free travel" on both the right and left sides feel about the same. The clearance between the caliper housing on the drivers side at rest is approx. about an 1/8 in. and the wheel rotates freely. There are scrape marks on the wheel, so I assume the caliper housing must be hitting the wheel. Like I said when I inspected the pads I didn't see anything wrong with any of the components. So I'm at a loss as to why the clearance is less on the drivers side as opposed to the passenger side and why did it happen almost over night. There is no vibration in the front at any speed and no noise while driving, only under braking. Again, any help would be appreciated, MiMitch.
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Old Jan 22, 2006 | 09:03 AM
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Originally Posted by MiMitch
When I step on the brakes it sounds as if the pads are steel to steel w/ the rotor. I checked the pads & they were OK. I noticed that the caliper hsg. on driver side seems to be rubbing on the rim. Almost no clearance between hsg. & rim on drivers side but approx. 1/4 in. on pass. side. Free travel of caliper hsg. on both sides seem to be equal. Rotated wheels and no interference or noise from wheel bearing. What would cause driver side to drop, or pivot towards rim when braking? Any help would be appreciated. Thanks, MiMitch
I had a chance to work on the car in DAYLIGHT, for a change and actually could see what I was doing.The noise was the caliper rubbing against the wheel. The cause was the pin holding the caliper and the brake pads to the mtg. bracket were worn,after139K,allowing the ***'y. to pivot at the top under braking and swing clear of the pin. I should also mention that the semi-circular retainer(s) on the pads were also worn, due to the constant pivoting action, caused by the worn pin. I replaced the pads and pins on both sides amd every thing seems to be back to normal. Again thanks to everyone who gave me some feedback with my problem. MiMitch
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