I have a terrible squeak on my drivers side rear brakes. I have replaced the pads, rotor, and caliper, and it is still doing it. I had my wheels off the other day and I noticed that when I pull on the wheels studs on the drivers side of the rear axle, I noticed that everything moves about a quarter of an inch. I tried it on the passenger side, and it doesn't move at all. I have been noticing that the noise is getting worse, and when I take left turns it makes a god awful screeching noise. I am thining that my c-clip in my rear axle may be worn out or somethin. Anybody have any ideas?

 

Anybody know?

 

I guess I am just gonna pull the cover off the rear axle and check it out. Where can you buy c-clips at?

 

Here is the solution.
One or maybe both of the rear rotors is rubbing a rear caliper bracket. I can almost guarentee this is causing the noise, it happens on LT1 rear brakes a lot.

There are two fixes.
The first is to remove the caliper bracket from the axle (2 bolts) and slide the bracket off off the caliper (just slide it off).
If you look closely at the bracket you will see the spots where the rotor is rubbing, you will also see the circular marks on the rotor too.
Get the disk grinder out and clearance the bracket in the areas where the contact is occuring and reassemble. I had to do this two times to completely silence the squeak.

The second method is to place a pair of thin washers or shims behind the bracket where it bolts to the axle. You are trying to slightly move the caliper bracket outward just a bit. I think GM actually sells the shim kit for this exact problem, however i dont know the part number.

The reason this happens is normal wear on the axle c-clips and or doing a R&P change. The axle is now allowed to extend outward in a hard turn and the rotor makes the loud squeak when it contacts the caliper bracket

 

Thanks for the input. I will have to check this out before I start tearin stuff apart. I just replaced my caliper last weekend on the side of the squeak, and when I looked at the rotor, it looked fine. But I may have just overlooked something.

 

Look on the beveled edege or corner of the rotor. If the rotors are new it will be haqrd to see. The wear on the bracket is obvious.

 

About to go outside and check it out. Thanks for all the info.

 

Well I replaced the c-clips and it did nothing. I am going to try grinding the caliper next.

 

had the same problem. the clutches in the carrier ware out and allows the axle to move also. i did what wrd1972 did and it helped. i put a rebuilt rear end in my car and the problem went away completly

 

How much would a rebuild cost?