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1996 GMC Jimmy Shakes/Wobbles

Tiny
YEP1
  • MEMBER
  • 1996 GMC JIMMY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 95,000 MILES
Hello,

My 96' Jimmy right front tire wobbles. I have changed the rotor, and replaced the tires. This wobbling only occurs when I apply the brakes. The faster I drive, the more intense the wobble when I apply the brake. Any suggestions on what could be the problem? Also, my steering wheel does not shake/wobble.
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Saturday, May 2nd, 2009 AT 6:11 AM

6 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
The pulsation may be coming from the rear. Do you have drums in the rear or disc?
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Saturday, May 2nd, 2009 AT 8:16 AM
Tiny
YEP1
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Actually, it is the right front area, which has a rotor. It wobbles when I hit the brake pedal. I feel no movement from the rear.
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Saturday, May 2nd, 2009 AT 9:43 AM
Tiny
YEP1
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Today, I bled all brakes, and it still pulsates in the right front area.
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Sunday, May 3rd, 2009 AT 7:29 PM
Tiny
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  • MECHANIC
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Sorry for not getting back sooner. Probably have it solved by now.

Drive it and feel for any heat differences from side to side in the front. IF no heat difference then, I would check the rotor for bad run out. IF you don't have the tool, then swap the rotors side for side and see if the vibration feels that it moved or not.

Before you pull the rotors, shake down the wheel and make sure no movement is in the wheel bearing, ball joints or tie rod end.
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Wednesday, May 27th, 2009 AT 5:35 AM
Tiny
YEP1
  • MEMBER
  • 10 POSTS
Actually, I do not. What I have done is replaced the tie rod ends and the right idler arm. I bled all four wheels. I have not replaced the ball joints though. It only occurs when I apply the brakes. When I drive, I do not feel any pulsating/vibration. I'm at a lost.
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Sunday, May 31st, 2009 AT 7:53 PM
Tiny
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Take the rotors back and have them warranty them. When you put them on, be sure the hub surface is clean.

Make sure that the brake pads are able to move on the sliding surfaces and they are not worn abnormally. Any grooves in the spindle must be filled in or replaced or the pad will not move. USe a high quality disc brake caliper grease on the moving parts. IF the caliper piston is stiff to return in, then replace both calipers.

If it were mine, I would replace the pads regardless as a pulsation usually leaves the pads abnormal. Frankly, the only pad/rotor combination I recommend at this point are the Napa ultra premium rotors and the adaptive one pads.
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Monday, June 1st, 2009 AT 6:04 AM

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