2000 Pon Grand Prix GTP, 113,000 Miles, v6 3.8 SuperCharged
At about 45-60 MPH only while accelerating - or holding the speed at say 55. I have a vibration, that acts like a tire out of balance, either that or the wheel is going to fall off.
The vibration is almost invisable at 65-70 MPH
The worst vibration comes while accelerating from 40-45 MPH while corning to the right only, that is where the wheel feels like it is going to fall off. To the left, it is not really apparent.
At higher speeds 60-70 and hitting a corner, the vibration becomes more of pulsating that can be felt.
Most of the vibration is not felt in the steering wheel, but rather my legs, not so much my "backside", as I have heard that with some vibrations - steering wheel is the front end, seat is rear end.
I was reading some posts about CV joints, could this be what I am looking at?
I was starting think transmission, but it really runs well and responsive all other times.
I thought spark or timing, my plugs and wires were replaced last summer (12-13K ago), timing, I was not sure (there is a muffler noise, towards the front, I have not looked into, perhaps a hole in a pipe, but it is not overly loud) as for timing, it really idles well, runs with good speed and the Super Charger kicks in as expected.
Any idaes, or troubleshooting - much appreciated.
have the same problem?
Friday, April 20th, 2007 AT 10:56 AM