Question about 2004 Mercury Grand Marquis

1 Answer

When applying the brakes, the whole car shimmys. replaced rear rotors , turned front rotors , and replaced all the pads

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Mercury Master
  • 5,468 Answers

I think you should get the Tierod ends checked. When you get a Front-end alignment, the mechanic will check them. Although you turned the front Rotors, when you start Braking the front tires can wander differently than when they freewheel.

Sometimes you can get a rust problem on the Rotors that were just made shiny. Moisture on the pads imprints a rust blotch on the Rotor and they grab at the rust until the rust wears down. Then they are ok.

When the rear Rotors were replaced check your bill and see if the Emergency brake shoes were changed. The E brakes should have been adjusted when the Rotors were replaced. The Shimmy you describe can also be the ABS working. The ABS is a pulsating Brake action.

Get your front-end checked first, then as the mechanic road tests it when the Alignment is complete, he can judge the brakes.,

Posted on Sep 11, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

Vehicle shimmies when brakes are applied


Loose tie rods that is what my problem was when my car did that. What happens is when you apply the brakes the tie rods move in and out

May 27, 2016 | 2000 Chrysler 300M

1 Answer

What causes brake shimmy C2500 1991 5.7L?


Brake shimmy is due to hot spots on the rotor or drum the metal is actually hardened in the spots causing friction differences when the brakes are applied causing front end to shimmy . If you have your rotors turned the hot spots are still present so I have always justr replaced rotors pads all at once shimmy gone .

Jun 11, 2014 | 1991 Chevrolet C2500

3 Answers

Front end shimmys when applying brakes no loose parts brakes good could possibly be front bearings if so how do you get them out very rusty and bolts in poor shape


The rotors for the brakes are most likely warped,they need resurfacing ,the auto parts store can do this for you.

May 17, 2010 | 1996 Honda Accord

2 Answers

Steering wheel shimmys at speeds 35 and up just changed rotors and pads no play in new wheel bearings doesnt shimmy when i brake though. any help would help greatly thanks


If it shimmies with the brakes applied, it's a rotor problem....but like you say, it shimmies just at a certain speed with no brakes applied, check tires for out-of-roundness. If they look ok, you are looking at a balance problem with the tires.

Oct 01, 2009 | 2000 Ford Ranger SuperCab

3 Answers

Front brake shimmy


I would try replacing the rotors altogether.If after resurfacing them your getting .010 runout on them in a few days, those rotors are getting soft.
Also, check the rotor mating surfaces, ie, where the rotor touches the hub when installed, and make sure it is clean and smooth. Any rust or brake dust buildup on the hub will prevent the rotor from sitting flush to the hub. I would also recommend replacing the brake pads, if you do the rotors, as the pads could have worn unevenly due to the rotors being warped.

Aug 09, 2009 | 2001 Subaru Outback

1 Answer

Steering shimmy when brakes applied


It sounds like either warped rotors or grease/oil on the pads. Jack up the front and pull the wheels off. Turn the rotors by hand to see if the rotors turn freely, then drag, then turn freely. If there is no grease or oil on the rotor surfaces, you need to either turn or replace the rotors. The job is a royal pain in the ****, so you may want to take it to a reputable shop.

Apr 04, 2009 | 1998 GMC Safari

1 Answer

I have a shimmy in mySteering wheel not all the time it comes on randomly.


In absence of more information, this is usually an symptom of warped brake rotors. A rotor can build up enough heat in a hard stop to be bendable especially with the high hydrolic pressure a brake pad can bring to bear. Simply, If you keep the brake pedal depressed hard after a hard/long stop it can warp the rotor. (NOTE: at a hard stop, as soon as possible let the car creep forward a few inches at a time so the brake pad won't be on any one spot too long, plus keep light brake pressure --only enough to keep the car from rolling). The warped rotor causes the brake pad and caliper to float too far from the rotor and you won't feel the shimmy until you apply brakes. Under brake pedal pressure each time the wheel rotates under brake pressure the rotor and caliper will rapidly vibrate a few millimeters to each side giving the sensation of a shimmy in the sterring wheel. Most of the time this can be corrected by having the rotors resurfaced( aka Turned)

Out of balance or out of round tires can also cause a shimmy but should occur at a given speed range. Warpped rotor shimmy occurs during deceleration.

Aug 04, 2008 | 2001 Dodge Grand Caravan

1 Answer

BREAKS


YOUR BRAKE ROTORS ARE WARPED/OUT OF ROUND, THEY NEED TO BE TURNED ON A METAL CUTTING MACHINE TO MAKE THEM RUN STRAIGHT AGAIN, THE BRAKE PADS WILL ALSO NEED TO BE REPLACED AT THE SAME TIME.

Aug 02, 2008 | 2003 Pontiac Grand Am

1 Answer

Steering whell shimmies when brakes are applied


A common problem with brakes are the rotors warping,which causes a vibration when applying the brake pedal.The brake pads,clamp down on the brake rotor,which slows the vehicle,and in the process,both items are subjected to very high temperatures.This is what causes the rotors to warp,which in turn creates the vibration you feel.Best solution is to replace the rotors and pads,with new.The calipers,which hold the brake pads,should be checked by the technician to make sure the piston is working properly,and not leaking.The rubber hoses should also be checked,no cracks or leaks,etc.Good luck.

Jul 29, 2008 | Toyota Solara Cars & Trucks

Not finding what you are looking for?
2004 Mercury Grand Marquis Logo

337 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

74945 Answers

fordexpert

Level 3 Expert

5467 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...