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Brake Shudder 850 1997

posted by  someone claiming to be JFarns on  Tue May 7 02:01 CST 2002 [RELATED]

The wife's '97 855T has started to have a shudder when you apply the brakes. I suspect that the rear roters are heating up and worping. The problem is especially bad after highway driving. We had this problem two years ago and the dealer replaced the brake calipers. I suspect the calipers are sticking again. What can be done to unstick them and keep this problem from occuring again ? Is the sticking really the problem or could it bee something else ?

JF








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    Brake Shudder 850 1997

    posted by  someone claiming to be Steve K on  Tue May 7 09:55 CST 2002 [RELATED]

    I am having the same problem with brake shudder - it usually happens only after the car has been driven a while and the brakes are heated up. It happened a few years back and my independent shop said it was warped rear rotors and replaced pads and rotors. It went a way for a time but is now doing it again. I'm taking it in to another independent shop (Volvo specialty) tomorrow. They looked at it once and said it can be solved only by replacing the rotors. They said if the whole car shudders (which mine does) then it is usually the rear, if the shudder comes thru the steering wheel, then it is usually the front.

    But, can my rear rotors be warped already if they only have 15-20K miles on them? I know there has been some discussion on the board that irregularly torqued lug nuts can cause rotors to warp. So far I have not gotten the diagnosis of a sticking brake caliper.

    Could there be a "hot" spot on the rotor? Any other thoughts from people who have had this problem? - it seems to be somewhat common. I will update with a new message after tomorrow when the shop comes up with it's take on the problem.

    Steve ('94 850, 104K)







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