2003 Pontiac Grand Am grinding noises from engine or front

Tiny
MIKE BOOGIE
  • MEMBER
  • 2003 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 67,150 MILES
I have had my car (Grand AM GT 4dr Sedan) for 6mths now and it's been running very well which I also drive it really good avoiding pot holes etc.I take very very good care of it. Just recently I have seen a change with a loud grinding you can call it noise from the engine or the front tires? I can't really tell that's the way it feels.I also noticed the car is not gearing properly and the RPM needle is acting funny too, the slightest touch the needles moves to fast for some reason. Plus I had to brake a little hard one day and the car didn't stop properly felt like it missed gearing down? Any clues to what this could be.

thanks
Mike
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Wednesday, March 26th, 2008 AT 6:21 PM

3 Replies

Tiny
SERVICE WRITER
  • EXPERT
Would you describe the noise as a roar or hum. Does the pitch change if very to the left or right?

Does the noise follow the rpm of the wheels or engine?

Will the noise happen if the car is in park and the hood is open while it idles?
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Wednesday, March 26th, 2008 AT 6:29 PM
Tiny
SERVICE WRITER
  • EXPERT
Rules out a wheel bearing.

This is starting to sound like an internal problem in the transmission. I have heard of various causes of noises that stem from the tranny. I'd say start by checking the condition of the tranny fluid, but thats is brutal with out a lift as there is no dipstick.

But have you seen any red fluid leakage at all? That may be a sign, but not necessarily. IT may be worth getting the codes checked to see if any transmission related ones are stored in it. This may not be a di-it-yourself kind of thing. A scanner will probably have to be hooked up and have it driven so a technician can monitor the datastream to see what is happening.
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Thursday, March 27th, 2008 AT 8:25 PM
Tiny
SERVICE WRITER
  • EXPERT
I'm really surprised there is no check engine light as this has to be affecting emissions. Based on the rpms and noise I would lean towards a speed sensor or more precisely the problem with the gear meshing of the speed sensor, broken teeth etc.

Codes need to be read before doing anything as I see it. I expect a transmission code to be in there of some sort at the least.

I don't know your area and the quality of the dealerships. Dealerships are only another shop under the manufacturer name brand. They are only as good as the individual techs and the ethics they follow. Some are great some should be run outa business. Independents are no different. I find there are a cut of independents that are above most, but finding them isn't always easy.
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Saturday, March 29th, 2008 AT 7:08 AM

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