1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Help with vibration diagnosis please.

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Old Sep 14, 2003 | 08:12 PM
  #1  
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From: Toms River, NJ
Question Help with vibration diagnosis please.

Hi everyone. I am experience a problem that has recently surfaced on my GSL-SE. I am looking for some opinions on what it may be and if anyone has experienced the same thing.

Ok, so I'm getting a bad vibration that feels and kind of acts like a car with warped rotors but it's worse. When I drive the car, I'm ok for the first few miles, then the wheel begins to shake (without applying the brakes) and when I get on the brakes, the harder i push the pedal, the more the car pulls to the left. When I accelerate again, the vibration is there, the steering wheel will shake (which increases with speed), but if I'm on a long road and I don't need to brake, the vibration slowly goes away to nothing, until I need to stop again, once I get on the brakes and accelerate again, I get the vibration, it's pretty violent too at times, feels like the whole front end is bouncing up and down, the shifter even moves back and forth in sync with the steering wheel.
I'm thinking it's my left front caliper? The car also doesnt roll easily, like it's the front caliper is stuck maybe? The brake pedal doesn't really pulsate at all, and like I said the vibration goes away while driving long distances without hitting the brakes, so I'm thinking my rotors are straight. Any input is appreciated. I want this fixed but I dont want to order something I dont need. Thanks.
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Old Sep 14, 2003 | 08:48 PM
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From: MN
My first though is that your rotors are warped. Pull them off and bring them to the local auto shop that can turn them and they can tell you if they're warped or not. The smallest imperfection in the rotor can easily throw off your braking. If your brakes are worn and your pistons in the calipers are extended out quite a bit, one could be stronger than the other and cause the pull to the left. Also you could have a bubble in the tire if it's over inflated causing the shake in the wheel. You might not just have one problem, maybe you have more than one. Check those out and see what happens.
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Old Sep 14, 2003 | 09:21 PM
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From: KING COUNTY, WA
sounds like alignment to mee... my friends car does the exact same thing.....
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Old Sep 14, 2003 | 09:23 PM
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From: SoCal.
Yes ! you are right on the money,, the piston is sticking.
it's kinda scarey feeling isn't it. rebuild or buy new.
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