Question about 1999 Chevrolet Silverado 1500

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98 chev p/u c/K1500 wheel rotor and hub assembly

Driving down the road and lost brakes. Did stop, but extremely hesitant as though I may have lost a caliper. I then took off again, and heard a noise like a bearing, I thought I had a bad bearing in the hub, and thought the wheel was going to fall off. I babied it home and pulled the wheel off, to my surprise the actual portion pf the rotor had seperated from the hub assembly and I could spin the rotor by hand as though the weld bead broke seperating the portion the brakes ride on from the portion that goes through the studs holding the wheel on. Are they two pieces? Did they in deed break?

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  • degies Jan 10, 2009

    just finished a front end brake job. The rotor was indeed broke from the hub, it came off in two pieces. Thanks

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  • 52 Answers

They are manufacturered in one piece, i would say it's broken and needs replacing

Posted on Jan 09, 2009

  • philip tovey
    philip tovey Jan 10, 2009

    your more than welcome and thank you for the fixya! rating, any time you need any help please fell free to ask me

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2 Answers

Front passenger brake is pulsing and there is no abs light on in my 1997 pontiac grand prix.I believe it might be abs sensor but don't know where to find it in wheel assembly.


A front brake pulsing with no ABS light is a rotor that is no longer true i.e warped. Pull off the tire and rotate the rotor. Hold a straight edge (ruler) across the outside of the rotor as your rotating the rotor. You will note that it changes distance on the straight edge / ruler as it rotates. (in out wobble) A good way to test for an out of true rotor is to drive at about 45 miles and hour and really stand on the brakes (do not lock them up) If the steering wheel and or brake pedal pulsate... you most likely have a rotor problem. If your rotor has never been "turned" it is probably time to do so.

The ABS sensor is behind the rotor on the lower control arm pointed outward toward the rotor with a flat button face. You can not see the button face with the rotor installed. If the sensor is bad you will have an ABS light. I think your troubleshooting the wrong problem. i.e rotor vs your current focus of the ABS sensor.

I would like some feed back on the running dynamic on the road brake test.

Thanks for choosing FixYa,
Kelly

Jun 06, 2011 | 1997 Pontiac Grand Prix

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Free, information


If you here a roaring noise in your front wheel and when you turn one way or the other and it stops. then your gonna be looking at changing your wheel bearing ( hub assembly ) , but how do you know which one to change. Well when driving down the road, move steering wheel back and forth easy, which ever way you turn the wheel and the noise stops that is which side is bad.
Example : your driving alone and you turn your wheel to the right and the noise goes away, then it's your right wheel bearing ( hub assembly ).if you turn to the left and the noise stops, then it's your left wheel bearing ( hub assembly ).

on Feb 02, 2010 | Chevrolet 1500 Cars & Trucks

2 Answers

Rotors keep warping


Could be a number of problems. Here are a few.

Defective Brake Pads
  • Brake pads that are defective and/or incorrectly installed can, over time, cause brake rotors to warp and become damaged. Brake pads are responsible for squeezing against the spinning brake rotor, an action that causes a vehicle to slow down or stop. If the brake pads are bent, misshapen in any way, or aligned and/or installed abnormally, they can exert abnormal pressure on the brake rotors, a condition that can cause brake rotor warpage over time.

  • Abnormal Brake Caliper Action
  • An abnormal or malfunctioning brake caliper can result in brake rotor warpage if the degree of brake caliper dysfunction is severe enough. A brake caliper houses a set of vehicle brake pads and provides the squeezing force necessary to squeeze the brake pads against the spinning brake rotor. If a brake caliper applies too much pressure to the brake pads, or if it applies pressure inconsistently, it can cause a brake rotor to warp over time. Adequate brake caliper action is necessary for optimizing brake pad and brake rotor function.

  • Excessive Heat
  • A vehicle's braking system generates a tremendous amount of friction-related heat, heat that normally gets radiated away from the brake pads and brake rotor mechanisms. However, in cases where excessive heat is generated within a braking system and not dispersed adequately, serious brake malfunctions can occur, which can include brake rotor warpage. A stuck brake caliper, old, worn-down brake pads, or a defective brake rotor can cause excessive heat to develop in or around a brake rotor, which can cause brake rotor damage and warpage.

  • Damanged Wheel Hub Spindle
  • A brake rotor assembly is supported by and rides on a long, slender metal tube called a hub, or wheel hub assembly. The hub is what allows for the smooth, even circular motion of the spinning brake rotor. Designed with a smooth, low-friction exterior, the wheel hub assembly is critical to the proper spinning motion of the brake rotor. Any abnormalities or defects with the wheel hub assembly, including hub warpage, cracking or misalignment, can cause abnormal brake rotor rotation, which in turn can cause brake rotor warpage over time. Normally, a damaged wheel hub assembly is noticed and remedied prior to extensive brake rotor damage, as a severely damaged wheel hub assembly will cause a vehicle tire to wobble and shake.
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    How do you tear down front hub on 4 wleel drive truck?


    FRONT DRIVE AXLE Manual Locking Hubs DISASSEMBLY AND ASSEMBLY Fig. 1: Three screws retain the cap to the hub body 91197g48.gif
    Fig. 2: Remove the lockring seated in the groove of the brake rotor assembly 91197g49.gif
    Fig. 3: Remove the hub body assembly from the brake rotor assembly 91197g50.gif
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    prev.gif next.gif

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      Wheel lug nut tightening sequence gm_trk_sub15_wheel_lug_nut_tight_seq.gif

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    2 Answers

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    Jul 09, 2008 | 2005 Mercedes-Benz Mercedes Benz E320 Cdi

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