shaking brake pedal?

Question

when i come to a stop my brake pedal shakes violently. i just installed new pads and rotors and they were workign fine until now

Answer 1

Try this site maybe?

http://www.faqfarm.com/Q/Why_would_the_brake_pedal_shake

Answer 2

While its true the reason your pedal shakes is most likely due to warped rotors, the reason is most likely the installation. Do not bother taking it to a mechanic for inspection, uneven rotors can't be confirmed or denied based on visual inspection. Also, I have never had any new rotor come to me that wasn't machined flat. Makes no difference if it was made on a Monday morning or Friday afternoon, the machines are not run by an impatient slacker in a hurry, but by automated equipment. If the lug nuts were not torqued in sequence to the correct value, then any set of rotors you put on will be damaged. Always use a torque wrench, never use an impact without the proper torque-stick. If you go to a shop and see them just zing the nuts on, make them do it over the correct way.

Answer 3

The shaking or "pulsating" when you step on the pedal usually indicates that you have at least one rotor that is warped. Take the vehicle to a mechanic and have them inspect the rotors for you. Most brake places will inspect them for free. It may be a matter of just turning (grinding) the rotors to remove the imperfections, or you may need new ones. But rotors are indeed the likely culprit here. Hope this info helped.

Answer 4

you're turning out to be an antilock brake circuit that's no longer sensing the brakes wisely and improperly correcting. Anti lock pulses the brakes once you word them. If the steerage wheel shakes while the brakes are utilized, the brake rotors likely have extreme area to area run-out or they're probably popular as being warped. vehicle techs call this brake shake or brake pulsation. answer have your husband replace the rotors he probably did no longer substitute them final time yet in basic terms buffed them. there is placed on on one fringe of th rotor... now the pads additionally via now have already had uneven placed on so he will could do them tooo additionally a substantial rationalization for that's while the nuts on the brake assembly are no longer tightened appropriate or are tightened erratically..! so substitute those warped rotors ! that's what motives the shaking... you may no longer choose for ur hubby to do the pastime if he did it 6 months and it brought about this issues... good ingredient is that u could nevertheless be under guarantee and get the pads and rotors for loose..

Answer 5

Make,model year,type etc.,etc...Can't tell whether your referring to a motor scooter or a semi truck....I am assuming it's a car...If you replaced just replaced the rotors and pads very recently, you may have bad new rotor..Those made in China or Mexico are oft times bad,,Check the rotors for run out. If you can see a wobble< with out a dial indicator they are bad....If everything looks ok then the problem is in the ABS system..If this started after you did the brake job it is the rotors....

Answer 6

I agree with everyone about the rotors, but what about the wheel bearings? Jack it up and start over, from the lug nuts in check everything for tight and runout, and then work your way out again. If you have a bad wheel bearing it can bottom out, and stay that way until the car is lifted and something is changed, like the brakes, then when they are rotated it moves on the spindle and you end up with chatter.

Answer 7

Brakes are nothing to play around with. Double check that the calipers are mounted down tightly and that you used clips on the pads. I would follow the advice of others and exchange the rotors, don't risk your life for $100 in parts.

Answer 8

did u have the brake job done or did you do it?new rotorsor used from a wrecking yard? the answer is simple...two words brake chatter. brake chatter is caused by two surfaces that don't mate perfectly. usually caused by uneven rotors when xchanging pads. turn the rotors.(on a brake lathe,...not TURN them!) high pressureon the lathe guy to meet production schedule probably had him turning them out too faast, leaving an uneven surface on one or both. at any rate,..try having the rotors turned.

Answer 9

Those are all great answers above.

However, if the shaking happens at relatively low speeds, or just prior to coming to a full stop, then you have an issue with the ABS system. That would need to be checked out by a professional

Answer 10

Replace brake rotors and DO NOT over tighten lug nuts.

Answer 11

more than likly the rotors you bought are warped, either have them turned or replace them, when you replace them let them get to normal operating temp before any heavy braking
this will cause premature warpage
do this and your problem solved