Question about 2004 Pontiac Grand Am

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Thumping noise from front end when driving 20 mph or more Increases with speed.Braking does not affect it.Changed cv shaft. No change

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  • Harold Bowers Apr 25, 2010

    Rotated tires,New rotors and pads.

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I've also had thunping noise related to tire revolutions. Had car checked twice with tires off and nothing was found. These tires have about 7/32 tread according to Toyota dealership.

Posted on Sep 21, 2010

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Tires /bent rim

Posted on Apr 25, 2010

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1 Answer

Front end noise


Assuming that you have already ruled out the brakes, severely worn engine mounts can transmit vibration and noises from the engine which are not normally heard. You don't say in what I see but is the vehicle two or four wheel drive. Since you mention CV half shafts I have to assume it is at least front wheel drive. If the vehicle is four wheel drive then there is a front differential with bearings in it that may be at fault. Have you done both sides when you say "hub assembly". Defective hub bearings will make grinding noises which will change tone or intensity when turning, accelerating or braking however the noise is usually fairly constant unless they are only just starting to fail. CV joints don't normally "grind" unless they are really bad. They usually make progressively worse "clicking" sounds or "clunking" sounds especially when turning hard, changing gears or direction of travel (forward to reverse and back again). Do you have non-stock tires/wheels? Larger/wider than factory spec tire sizes can rub the fender wells when the car is moving or turning. Another thing it could possibly be is the air dam below the front bumper. If it is loose it will push down in the airstream while the car is moving and rub on the ground.

May 12, 2013 | Cars & Trucks

1 Answer

Thumping noise coming from front end


If the noise indeed does get louder when turning right, I would suspect the leftside hub.

Apr 05, 2013 | 2004 Chevrolet TrailBlazer

1 Answer

1999 Subaru Forester has developed a shake when accelerating, esp. between 20-30 mph. Wheel bearings replaced - didn't help. Tires checked, balanced, etc. - didn't help. Front end allignment - didn't help....


Auto or 5-speed?
Subarus have CV axles in front and back. And a drive shaft from the center differential of the transmission to the back differential.

Yes, it could be the drive shaft or axle. If you turn the car hard left or right do you hear any noises - usually a 'clicking' sound? This is likely a CV axle in front.

Check the fluid in the transmission (Automatic) (info is in the Owner's Manual) to make sure it's full and/or gear oil in the front differential.

If it's an Automatic transmission, the fluid may need changed - NOT FLUSHED - if it has more than 30K miles since last changed.
GL,
TD

Sep 10, 2010 | 1999 Subaru Forester

1 Answer

2002 aurora, ticking/buzzing noise from front of car. louder with increased vehicle speed, but not affected by engine rpm. checked brakes, calipers, pads, tires, all look good. transaxle fluid level...


so it has some to do with rotation. you can jack one front wheel up, set parking brakes, start the car and put in drive. which ever side make noise, that's the one you need to inspect cv-axle, wheel bearing, ect.
check any thing that turns with the wheel

Mar 29, 2010 | 2002 Oldsmobile Aurora

2 Answers

Thumping coming from front end all speeds.


IF IT ONLY THUMPS WHEN YOUR CAR IS MOVING YOU COULD BE WRITE. PAY ATTENTION TO THE THUMPING CLOSLEY, DO YOU FEEL A VIBRATION IN THE STEERING WHEEL, IF SO THE PROBLEM IS IN THE FRONT END. IF YOU FEEL A VIBRATION IN THE DRIVERS SEAT THE PROBLEM IS IH THE REAR END. YES THE VIBRATION FROM THE FRONT STEERING AND THE DRIVERS SEAT IS A WAY TO TELL WHERE THE PROBLEM IS

Aug 10, 2009 | 1994 Volkswagen Jetta

1 Answer

"Humming" or "bearing" type noise in left front at highway speeds


That's a hub bearing. Replace the one that's doing it. I'm assuming this 'roar' is coming from the front, NOT the rear.

Jun 10, 2009 | 2001 Hyundai Elantra

2 Answers

Front end knocking from 97 sebring


Move it to 3rd instead of drive and see if you still have the noise. May be transmission related since you have replaced everything else.

Mar 10, 2009 | 1997 Chrysler Sebring

2 Answers

98 Eldo with a thumping noise in front end


I had similar problem with my eldo...The clunk(sounds like a stick hitting the bottom of the car) in the front end turned out to be stabilizer bushings, kinda pricey and the Light your getting sounds like you have a bad connection where the speed sensors connect behind the rear hubs, I also had that problem, I accidentally hit the clips when I changed the brakes and all the same symptoms..Good luck

Feb 03, 2009 | 1998 Cadillac Eldorado

2 Answers

Rear end thumping noise


Depending on the year of your gto it could be a buggered CV joint on one of your back wheels. All GTO/3000GT are four wheel drive but up to the mid to late 90's they had four wheel steering. The usual symptoms of a buggered CV joint are loud rattling and/or vibrating from the affected wheel at around 30 - 40 mph and often a loud clunk when cornering at low speed

Aug 12, 2008 | 1991 Mitsubishi 3000GT

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