Whining noise and rear vibration

WILL2002

MEMBER
2000 PONTIAC GRAND PRIX
3.8L
6 CYL
2WD
AUTOMATIC
198,000 MILES

So I have a whining noise in front. Seller said it was bad A/C compressed. It gets louder as I accelerate (just looking for truth that this could be the problem). I am also having concerning vibration in the back first appears at 30 mph gets worse as I get up to 50 mph. Also gas pedal is loose. Looking to see options on this and how serious these problems can be?

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

The vibrations that you are feeling in the back of your vehicle could be a couple of things, mainly, your rear tire(s) could have thrown a wheel weight used to balance them, or, you could have wheel bearing(s) that are starting to fail. To have the wheel balanced, you simply need to take the vehicle to where you purchased the tires and have them re-balance them for you. To test the wheel bearing you will need jack the rear of vehicle up and secure it on jack stands. I have included a link below if you are unfamiliar with the proper way to do this:

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

Next go to one of your vehicle's rear tires and try to move the top of the tire towards your vehicle and then back away from it. There should be no play at all and you should not be able to move your tire this way at all. If any play is evident then your wheel bearing has failed and will need to be replaced.
Please get back to us with what you are able to find out and we will have more guides and instructions at that time should you need it.

Thanks,
Alex
2CarPros