Violent shake in front end when braking

Tiny
TRACI LINXWILER
  • MEMBER
  • 2003 CHEVROLET MONTE CARLO
  • 3.8L
  • 6 CYL
  • FWD
  • 200,000 MILES
Have replaced all suspension and brake components on front, yet car still shakes when braking. Was told could be ABS system? Checked new rotors less than.002 out. What else?
Monday, November 21st, 2016 AT 3:36 PM

9 Replies

Tiny
JIS001
  • MECHANIC
  • 3,408 POSTS
Do you have after market wheels?
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Monday, November 21st, 2016 AT 3:41 PM
Tiny
TRACI LINXWILER
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  • 9 POSTS
No, factory.
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Monday, November 21st, 2016 AT 4:36 PM
Tiny
JIS001
  • MECHANIC
  • 3,408 POSTS
If you have drum brakes apply the parking brake and see if you notice the vehicle shake. If it does then you will need to have the drums turned or replaced. If you replace the drums then have the new ones turned also. I have seen with most aftermarket drums I end up having the vehicle come back because they are warped.

If it is okay then have the rotors resurfaced just to make sure they are not warped.
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Tuesday, November 22nd, 2016 AT 10:56 AM
Tiny
TRACI LINXWILER
  • MEMBER
  • 9 POSTS
Rotors are new and checked with dial indicator myself. Less than.002 out
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Tuesday, November 22nd, 2016 AT 11:19 AM
Tiny
JIS001
  • MECHANIC
  • 3,408 POSTS
What about the question about having drums?
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Tuesday, November 22nd, 2016 AT 3:33 PM
Tiny
TRACI LINXWILER
  • MEMBER
  • 9 POSTS
Rotors front and back.
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Tuesday, November 22nd, 2016 AT 4:24 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Hey Traci,

I would rotate the tires front to back, I have seen where the tire layers separate which causes the shaking sensation under braking.

Please let us know happens so it will help others.

Best, Ken
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Tuesday, November 22nd, 2016 AT 6:22 PM
Tiny
TRACI LINXWILER
  • MEMBER
  • 9 POSTS
Unhooked the speed sensor wires on both front hubs and shaking has stopped. Apparently it is something in the abs system
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Wednesday, November 23rd, 2016 AT 4:42 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Nice work, never seen that problem before.

Best, Ken
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Wednesday, November 23rd, 2016 AT 11:31 AM

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