Question about 1998 GMC Jimmy

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Rear brakes / bearing area bad vibration, now clanging...

I went out of town for thanksgiving and while gone I had my rear brake calipers seize on me to the point I had smoke coming out the rear area. Had both calipers / pads replaced, rotors looked to be ok. So this week of Dec the 15th, I noticed a bad vibration / buzzing, coming from the passenger rear tire area when I was on the accelerator (it would die off if I took pedal off to "coast" ) On the way home from an errand today (16th) about 1/2 a mile from the house, I heard something seem to "give" and the vibration became a clanging, shuddering, "Ooooh ****" sort of sound. I limped the truck home, jacked it up and took the tire off, wondering if maybe the rotor had snapped loose from the brake rotor hub (had that happen on a talon once) but saw very little as it had gotten dark outside.

So what are my possibilities here for what broke? Considering the area, im worried its something drastic (that i wont be able to afford) but wondering what specific things I should check? Thanks!

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I'd certainly take a look at the driveshaft "U" joints. as well as rear brakes. I'm surprised you didn't have to replace rotors, because if they were heated up that bad, it's hard to believe they aren't warped.Also, when you have rear wheels off for inspection, double check for any axle seals leaking, as well level in housing

Posted on Dec 17, 2008


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no they are bad, unless its brakes
a real mech , checks both.
its one or the other, or worse. bad axle gear/bearings/

the fsm covers both. ever seen the real book? on this car.
the ZJ book is here and free
posted like 100+ times, now......

keep in mind jeeps may have different axles.
2wd, 4wd, and locking axles (options)
models 30, 35 and 44 so the details vary that is why the book wins here. the real book wins.

diagnosis is an other matter, i have an electronic stethoscope
that allows me to drive and hear each bearing. cost me $35.

id inspect brakes first. after all they are in clear easy view.
make sure the brake parts are not seized. that includes
the Emg. brake parts !!!
does you car have ABS brakes?
some have drums others have rear disc brakes, the linked FSM
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for example disc calipers can fail in many ways
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cracked rotors, or warped.

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Removal Procedure
  1. Raise the vehicle. Refer to Vehicle Lifting in General Diagnosis.
  2. Remove the wheel and the tire. Refer to Tire and Wheel Removal and Installation in Wheels, Tires and Alignment.
    1. Remove and support the brake caliper. Refer to Brake Caliper Replacement (Front) or Brake Caliper Replacement (Rear) in Brakes.
    2. Remove the brake rotor. Refer to Brake Rotor Replacement in Disc Brakes.
    3. Remove the ABS sensor wire connector.
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    5. Remove the hub and bearing from the control arm.
    6. Remove the brake shield from the control arm.
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    Notice: Refer to Fastener Notice in Service Precautions.
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    3. Install the brake caliper. Refer to Brake Caliper Replacement (Front) or Brake Caliper Replacement (Rear) in Disc Brakes.
    4. Install the wheel and the tire. Refer to Tire and Wheel Removal and Installation in Wheels, Tires and Alignment. Tighten the wheel nuts to 140 Nm (100 ft. lbs.).
    5. Lower the vehicle.

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