Why are my brakes chattering on a 1995 Chevy Monte Carlo?

Answer 1

Since you already have chatter have the rotors checked Leading cause of chatter

Lug Nut Torque

Over-torque of wheel lug nuts is one of the prime causes of brake rotor distortion. This can lead to permanent warping of the rotors, uneven wear of the rotors and pads and lots of brake chatter (NVH). With today's very stiff alloy wheels, like from BBS, SSR, Volk, etc., when you torque down the lug nuts the wheel-mounting surface will force what ever it contacts to take its shape. Which means whatever that surface looks like will be what the rotor looks like. Get a torque wrench and check the torques on every lug nut and make sure they are within the specs (which you should be able to find in your owner's manual). And make sure that every lug nut is torqued down exactly the same. Even if all 5 on a wheel are within specs, not having all 5 be equal will introduce distortion. And if you think that your light alloy wheel can't possibly be that stiff, you wrong they are MUCH stiffer than the brake rotor or even the hub. WORD OF CAUTION: Don't assume that torque the lugs to the lowest range in the spec is the best. Try and keep it nominal not at the extremes of the range. Much of the problems with rotor warp, brake chatter, disk thickness variation can be traced back to over-torque and uneven torqued lug nuts. After coming back from the shop, get that torque wrench and check the lug nuts yourself. Good Luck and Remember.
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