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Violent shake in front end when braking

Tiny
TRACI LINXWILER
  • MEMBER
  • 2003 CHEVROLET MONTE CARLO
  • 3.8L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 200,000 MILES
How can I disable ABS to see if it might be causing problem? Tried the fuse but it is shared with crank sensor. Could I unplug wires at hub for a short drive to see if problem persists?
Tuesday, November 22nd, 2016 AT 12:01 PM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
A mechanic can scan for codes as well to see if it is an ABS problem, but your brake light on dash would be on as well.
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Tuesday, November 22nd, 2016 AT 1:14 PM
Tiny
TRACI LINXWILER
  • MEMBER
  • 9 POSTS
Has new rotors, brakes, a arm assembly, balance, wheel bearings, everything but tie rod ends and they are good. I have spent close to $1,500.00 at three different shops to no avail.
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Tuesday, November 22nd, 2016 AT 2:05 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have you checked the tires for a bulge or something like that? Normally they would do it all the time, but if it happens like you say with all the parts you have replaced there is something wrong with the front end or the ABS. A mechanic should be able to get a code for it.
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Tuesday, November 22nd, 2016 AT 4:21 PM
Tiny
TRACI LINXWILER
  • MEMBER
  • 9 POSTS
Tires are about half worn, but did check and they are good. Besides it did it before I got these new.
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Tuesday, November 22nd, 2016 AT 4:27 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have the sub-frame mounts checked that is the frame where engine and transmission are mounted to the body. Also, check motor and transmission mounts it may be moving when you hit the brakes.
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Tuesday, November 22nd, 2016 AT 5:09 PM
Tiny
TRACI LINXWILER
  • MEMBER
  • 9 POSTS
Unplugged speed sensor wires on front hubs and shaking stopped so must be in abs somewhere
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Wednesday, November 23rd, 2016 AT 4:45 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Yep that's what it sounds like, it could be a WSS problem, I would test them all, here is a guide on how to do that,

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

Please let us know happens so it will help others.

Best, Ken
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Saturday, November 26th, 2016 AT 7:56 PM

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