SaabCentral Forums banner

1 - 6 of 6 Posts

·
Registered
Joined
·
28 Posts
Discussion Starter #1
Well, I've had this problem since I bought my car, but its time I do something about it. When I brake from high speed, it the whole car shudders. It doesn't pull to one direction or the other, just shakes around. I figure it is warped discs or something, but that would be kind of odd, becuase I have the service history for the car... Seems the rotors were changes not more than 15K ago. Any ideas? Maybe I'll take it down to the brake place and see what they have to say...
 

·
Registered
Joined
·
722 Posts
it does sound like warped roter mate , the usual cause of them warping is heavy braking then sitting at lights ect holding the footbrake , the heat sits in one place and warps the discs:(
 

·
Registered
Joined
·
896 Posts
Warped rotors can happen pretty quickly, even on new rotors. That's why you should always torque your lugnuts and make sure the mounting surfaces are pretty clean of rust and grit that can throw the runout out of whack. If you don't feel it in your steering wheel then chances are it's the rear discs that are warped. It's not a hard job to DIY.
 

·
Registered
Joined
·
883 Posts
If it is warped you will feel it at any speed - the commonest cause of brake judder at high speed is unevenness of the surface composition due to new pads. The compound reacts with the hot metal and effects the friction quality of the surface in patches on the disk surface -likely caused by holding the brake on after a hard stop. This can be cured by getting up to speed on an empty bit of road and repeatedly applying the brakes hard to slow the car right down but not stopping - leave a couple of mins between each brake.
 

·
Registered
Joined
·
7,035 Posts
and heavy braking followed by an immidiate auto carwash-yep lots of steam!
 
1 - 6 of 6 Posts
Top