Question about 1998 Pontiac Grand Prix

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Will turning rotors fix a warpage issue? Before a recent brake pad change I noticed a shaking when applying the brakes. It is still somewhat noticeable after the brake pad were changed.

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Well if they did a brake job at a shop they most likely turned the rotors, turning them if done right should fix it but, do not forget if they are to then below specifications it can cause it as well. I would check the price on new ones that is the better solution. If they are turned then they will be thinner and warp again even sooner.

Posted on Jul 25, 2009

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Sounds like they need to be skimmed, find a good auto shop.
Warping or shaking is caused by heat distortion to the disks or grooves caused by running the brakepads down too low.Skimming resurfaces the disks.

Posted on Jul 20, 2009

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5 Answers

Why does it shake whenever i let off the gas and shakes real bad when i apply my brakes


If when applying the brakes the steering wheel shakes then your front rotors are warped and at the least need resurfaced and most likely the brake pads replaced. But more likely the rotors are too thin which has allowed them to overheat and warp which causes the shaking. In this case new rotors and pads are in order. If when braking tou feel the shaking in the seat of your pants then most likely the rear brakes are the issue. Same problem as the front, warpage, but your rear brakes are most likely drums. Again, possible resurfacing and new shoes; but more likely new drums and brake shoes.

But I wonder? Did this vibrating just start all of a sudden or maybe after a near accident requiring you to brake very heavily and possibly overheat the brakes. Or my main concern, to keep this from happening again, after pulling some type of trailer that you intend on pulling again. Pulling a trailer without its own brakes puts a much heavier load on your trucks brakes and just repairing them won't keep it from happening again if you ARE pulling a trailer. Higher quality rotors/pads/drums/ and brake shoes can help but if the trailer is too heavy for the truck nothing but installing brakes on the trailer or a lighter trailer will stop you from warping them again.

Lastly, in general when you let off the gas and the whole vehicle shakes the driveshaft/u-joints are common causes. Same with the steering wheel if it shakes when letting off the gas, but only on a 4x4 or AWD vehicle. So check your driveshafts and u-joints and make sure they are tight. But unless you find something obvious there I would wait until you have the brakes sorted out and see if that doesn't stop all the shaking.

Good luck!

Jun 24, 2014 | 1995 GMC Jimmy

4 Answers

Steering wheel shakes at high speed when brakes are applied


This is caused by the front disk brake rotors being warped from heat and running out of true, the wobble of the warped rotors causes the wheel to shake when you apply the brakes, it is worse the higher the speed you apply them at. Have the front rotors machined flat again or just replace them.

Mar 16, 2011 | 1998 Toyota Camry

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.
  • Feb 04, 2011 | 2004 Jeep Grand Cherokee

    2 Answers

    Front end shakes when braking


    will try to help. when front wheels shake while applying brakes and you can feel shake in steering wheel, front brakes and rotors need replacement.rotors are warped,if you replace front brake pads, it will return[shaking when you apply brakes] suggest that you replace front rotors[both] replace [both]front brake pads. cost? i would charge [brake pads cost $55.00] labor,$60.00] total $115.00 thank you for choosing fixya.com

    Dec 04, 2010 | 1998 Ford Windstar

    1 Answer

    When brakes applied the steering wheel shakes.


    Your disc brake rotors are warped. Solution? Remove the disc brake rotors and have them turned on a brake lathe. Warpage comes from a hot disc brake rotor going through a puddle of water which causes the warpage. If you have a Parking Brake, get in a safe area and when stopping, ONLY apply the parking brake. If the steering wheel stops shaking...there's your problem...warped disc brake rotors.

    Sep 11, 2010 | 2003 Ford Expedition

    1 Answer

    Toyota corolla 2008 gli model steering wheel shakes when brakes applied at 50kph or above


    Most likely cause is warped rotor pulsations that display in this way. Next, I would check tire balance. If rotors have been turned before, this makes them more prone to warpage due to less metal mass to disapate heat cause by friction of pad against rotor surface.

    Aug 12, 2010 | 2008 Toyota Corolla

    2 Answers

    Evaluting Brakes/Calipers and Rotors Front end shimmeys when applying brakes at all speeds...


    the roiors are "warped" you could have them machined but the problem will come back and be worse due to thinner rotors. replace with new rotors.
    and high quality brake pads. recomend the ceramic ones they are way more exspensive but last way longer, make less dust and noise and are able to better handle the heat produced by your driving situation. heat from exessive usage is what causes rotor warpage

    Apr 28, 2010 | 2001 Dodge Dakota

    1 Answer

    Steering wheel shake when braking


    The usual cause for this is because the brake rotors on your Stratus have warped slightly. In the old days, it was easy enough to simply change the brake pads and then have the rotors "turned" (machined) so they turn true. Nowadays, finding a place to have your rotors machined isn't all that easy, though you may just get lucky. It's usually around $10/rotor. Replacing the rotors sometimes seems to be the only option. You'll be able to find them at Advance Auto Parts, Auto Zone, etc., and usually run around $30/each. Of course, while you have the brake calipers removed to remove the rotors, you may want to go ahead and put a new set of brake pads on there as well. You'll notice an immediate difference in braking once you get back on the road, without all that incessive shaking to a stop!

    I hope this helps! :)

    Apr 07, 2010 | 2005 Dodge Stratus

    1 Answer

    Shake/Shudder while depressing the brake.


    I just changed the brake pads and rotors on my father's 2001 Trooper that he recently purchased because they were shaking just like your were.  He bought it from a mechanic shop and they had put new pads on it but it needed new rotors as well.  If there is noticable groving on the rotors and new pads are installed it can create shaking, sometimes severe, when the brakes are applied.  It sounds like this is what has happened with your vehicle as well.  That being said, I don't consider it a huge safety issue to drive it until you get it fixed, just know that your braking will not be optimal and that it will take you longer to stop than if the brakes were working properly.  All that being said, get them fixed ASAP so you don't have to worry about it.  Who wants to mess with safety right?  Good luck, hope this helps!

    May 18, 2009 | 2000 Isuzu Trooper

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