Originally Posted by
NotEnoughGPs
I have driven some GP's in the past with high mileage, currently have one with 224K miles. In almost every case of vibrations, it was due to the tires not being balanced correctly. I know you said the tires are ok, but try rotating the rear tires to the front and see if you still have the problem. Since your tires are new, it is unlikely they are cupped. So, that will not be the issue.
Since you have new tires, get a good 4 wheel alignment. I have all my alignments done at a local shop with Bear alignment equipment. Also, I heard that Hunter equipment is good. Be sure to tell the shop that you are experiencing vibrations at highway speeds, and have new tires and new axles. A skilled shop worker will be able to advise you as he is doing the alignment as to what problems you have that are causing the vibrations. As mentioned by the other GPF members, it could be tie rods, ball joints, motor mount or even wheel bearings, lower control arms, worn strut parts or front end accident damage. It is possible, however unlikely, that one of the new axles is bad. Also, I have had new wheel bearings installed and had one of them go bad in less than 10,000 miles. Something is causing the vibration at highway speeds.
After the shop does a proper alignment, they should tell you to drive the car right away at speeds above 50mph to see if you are still getting vibrations. What I am saying is that a good alignment shop can help sniff out drivability issues since they deal with cars everyday.
The shop I go to is in Butler, PA (right off RT 422) and they have helped me in the past. Their prices for complete 4 wheel alignments is not bad. They pointed out problems with wear issues with the car and I got those items replaced. My GP with 224K runs very smooth at all speeds. Also, this shop has told me that GP's are a quality built car. Hmmm
11-21-2015
