Vibrates constantly

CANDEE301

MEMBER
2005 CADILLAC STS
V6
2WD
AUTOMATIC
140,000 MILES

Question#1
When my car stops idling, my car starts vibrating also. When I press on the gas, the vibration stops. The vibration is loud and annoying. Did anyone find the solution to this same problem?

Question #2
When I'm at a stop and I press on the gas, I can hear like noise trying to come up through my rear floors in the middle. It sounds like, I don't know, maybe an engine. I think it's the transmission. Any help will be great please. Is anyone having the same problem or has been resolved?

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

This could be a couple of different things going on here. It could be a bad wheel bearing(s), or, more likely from your description, your vehicle's U-joint(s) going bad. U-joints are what let's your vehicle's drive shaft have the ability to flex and still work, coming from the transmission and turning the rear differential, which in turn turns the rear axles, which turn the tires. The U-joints have needle bearings in them and when they loose their lubricating grease will fail causing vibrations whenever the driveshaft spins. Here is a link for you to go to below explaining how to replace your vehicle's U-joints:

https://www.2carpros.com/articles/how-u-joints-work

Please go through this guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros