Thread: Brake Problems - 2006 Grand Prix 3.8 Base

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  1. #1 Brake Problems - 2006 Grand Prix 3.8 Base 
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    2006 Grand Prix 3.8 Base

    Symptoms: Doing 75 mph on open freeway when steering wheel began to shutter and car started slowing down like the brakes were being applied. I put foot on brake pedal and any pressure at all felt like brakes would lock up. There was no play at all in brake pedal. Pulled off freeway and could smell brakes. Front rims on both sides were hot to the touch. Back hubs were normal. Limped to a nearby Pep Boys shop. They could touch the car for a couple of hours. When they did, they wheels turned freely, they checked front rotors and brake pads to be fine, test drove it at 40 mph and told me they could not duplicate the issue.

    Today, same scenario, 75 mph, steering wheel shuttering, I applied a very slight brake pressure and the shuttering got profoundly worse. Then, put my left foot under the brake pedal to pull it up. I didn't sense any movement. I pulled off the freeway and pumped the brakes several times. Started driving again without the issue. I then drove the car a Pep Boys near my home that had put on new front rotors, front brakes and alignment 700 miles ago. I had bought the car with 34,000 miles on it last month. I have driven it a total of 700 miles. So, can't say if it is an existing condition or a new problem.

    I looked up potential causes and the ABS wheel sensors could be a problem. But, so could several other factors. I don't think that Pep Boys mechanic can track this down without duplicating the problem.
    No ABS warning lights have come on. And, I did not check for any codes.

    Has anyone experienced this type of braking problem and found the solution?
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  2. #2 Re: Brake Problems - 2006 Grand Prix 3.8 Base 
    GT Level Member mguzzo's Avatar
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    perhaps ther'e's an internittent speed sensor issue in one of the hubs. A would think that a tech 2 scanner could monitor the inputs from each hub during a drive and get a snapshot if it occurs.
    --
    "Silver Bullet" 98 GTP Coupe: Stock, rust free, and broadsided.
    Old '98 GTP Coupe: VS Cam, 3.0, S2IC, 42.5#, TOGs, N*/LQ4, Corsa. it once ran a 13 flat
    Older '98 GTP Sedan: Pullied, rockered, SSIC, etc. Stock 14.33 @ 96.5 / PB: 13.89 @ 101
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  3. #3 Re: Brake Problems - 2006 Grand Prix 3.8 Base 
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    Seems like it only happens when it is getting hot. I have seen plenty of hack mechanics jam the pads in the brackets without sanding them down, cleaning and lubing the slides. The pads may be seized up in the brackets and overheating the rotors at the high speed temperatures. Make sure the pads move freely in the brackets and the slides are good.
    2017 Buick Regal 2.0 Turbo (SOLD 2007 Grand Prix GT. Front and rear PLOGs, 1.8 roller rockers, CAI, HPTuned, 3.4 pulley, TEP transmission, 90# springs, rollmaster single chain, Impala front brakes d/s rotors.) Past (Pontiacs) Grand Prix- 97 GT, 03 GT, 04 GT, 04 Comp G, 78 Trans am, 92 Trans Am.
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