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Old April 8th, 2003, 11:13   #9
FlyTDI Guy
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Join Date: Nov 2001
Location: PNW
Fuel Economy: 56.5/44/41
Default Anyone Know Why My Brakes Squeak In Reverse Only?

My '01 does the same. The brakes squeal in reverse only, yet are silent going forward. My interpretation of this is:

a) The rotors are NOT warped
b) It is not indicative of anything faulty in the brake system itself.
c) It is a very high speed oscillation caused by the friction/interaction between the rotor and pad material.
d) Most often, it is the pad backing plate vibrating against the caliper housing that produces the squeal.

It is my opinion that the the natural wear pattern on both the pads and rotor combine to produce a polarization of sorts. In reverse, you are 'going against the grain' as it were, and the oscillation occurs. Many other makes of cars use 'leaf spring' and 'rubber mat' devices to prevent squeal. These essentially amount to dampeners between the calipers and pads. I wouldn't take this as a fault or dangerous but is somewhat embarassing coming from a new car. I am about to change out my pads to some Mintex Reds and hope that it will resolve the squeal problem as well. If, indeed, there was a TSB about this and the dealer will fix it for free, I would go for it. My pads are going to need replacing (rear only) anyway so that is my solution. I am hoping that the composition of the pad material on the Mintex's will not be as susceptible to producing squeal as the OEM pads.
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