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Old 08-15-2002, 09:44 AM
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Post help im shaking and dont know why

hello all i have a 93 ford aerostar van when i got it it had a bad vibration when you hit the brakes so i put new rotors and brakes on and it didnt help so took the rotors back got more still didnt help took it and had the front end checked and all they said was that i needed new wheel bearings and had a rotor that needed turned so i got the new rotors turned and put new wheel bearings in and put new calipers on too and guess what it still vibration when you hit the vrakes and only when you hit the brakes so can anyone think of anything else it could be any help would be appreciated thanks

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Old 08-15-2002, 01:49 PM
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Do you know if it's coming from the front or the rear brakes? Front brakes will usually cause the steering wheel to shake, rear brake vibration feels more like it's coming up through the car. That's usualy the first step, isolate whether it's coming from the front or rear brakes. Sometimes if the rear drums are bad enough you can feel it by applying the e-brake lightly to bring the car to a stop in a parking lot. But that trick isn't fullproof.
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Old 08-15-2002, 05:18 PM
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well i have tried the e brake thing many times with nothing accomplished sometimes the steering wheel will shake a litle but not all the time and not much when it does i put new tires on the front too thinkin that might be it but nope havent checked the rear brakes yet but i will but it just seems likes its in the front but i will try anything so thanks for the help i really appreciate it
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Old 08-15-2002, 06:04 PM
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One more mention for ya. While you're checking things jack up the front and make sure there's no play in your inner or outer tie rods, ball joints, etc.
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Old 08-15-2002, 06:30 PM
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already checked all that too i even took it to sears to have them check it all too but thanks for the help
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Old 08-16-2002, 11:37 AM
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have someone follow you from behind and watch your wheels as you stop and if they see one wiggle that will narrow things down. actually all they have to do is stand on the side of the road and watch you, (twice) :p

[ August 16, 2002: Message edited by: bullheimer ]</p>
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Old 08-16-2002, 01:07 PM
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ok ill try that too thanks for the help
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Old 08-17-2002, 05:29 PM
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Bullheimer, has a good idea, with watching the wheels when you stop. I was going to suggest you use a micrometer to check the thickness all the way around the disc. It should be the same. In addition I would use a radial run out gauge, on the outside of the disc. This will tell you if the wheel is wobbleing. This may be a smaller amount than your eye can detect. Also there is a chance that the spindle may have been damaged with the old bearings, and putting on new bearings would not have helped that situation. Brake pads may not have been ground flat at the factory. I have seen them bad right out of the box. In short, if you are sure your front end parts are tight, and the wheel bearings are adjusted properly, that would only leave the rotor, spindle, and brake pads that could be causing the problem. Being new doesn't automatically mean they are good.

If you don't have the micrometer and run out gauge, you can probably rent those items. If all else fails, you may have to take it to a brake specialist, tell them the whole story before you bring the van in, and see if they can find the problem.

Let us know what you find out.
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Old 08-18-2002, 07:40 AM
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i already took it to sears and they checked everything im sure they didnt check the spindle but they checked everything else i bet cause the sears store here checks everything and good too cause they want to get your money lol but anyway i may have to take it elsewhere or rent those tools cause this thing is driving me nuts and i have noticed that the steering wheel does vibrate more than i have thought i guess i was just use to it doing that but payed extra atention to it and it does vibrate but anyway i really thank you guys for the help and ill let you know what i find out
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