Saab 2001 9-3 Conv. Vibration at and over 55 mph.?

Question

35000 miles.- Accepted to replace front rotors and pads....No change.-Suggestion that a bearing , either rigth or left could be damaged, later disregarded by mechanics ( Dealer ) Grinding noise L>R went away......3rd. trip to Dealer a bent front wheel was found and removed....Vibration continues.....Wheels were rotated, spinned and balanced.....Front vibration continues...Disappointed with the expensive incompetent certified dealr's technicians; Contacted Saab Headquarters, referred me back to the dealer. Any advise what to do? Thank you.

Answer 1

A couple of things you should have checked. You did not say if you thought the vibration was at the right or left side, so have these two items checked. The inner drivers, called the companion flanges by some, will get grooved in the cups and cause a vibration on acceleration but will "float" out. Also check the right side inner bearing sleeve at the bearing support at the right axle support. Both of these items will cause your vibration, however, both will "float" out under a coasting condition. They will be felt most under acceleration at speed, aka, passing or hills. One other item, the drivers side bearing at the inner driver has a steel sleeve inside the bearing that the driver's shaft rides in. This was done to save money by GM instead of having the right bearing made. This sleeve will wear and allow the inner driver to "orbit" rather than spin true. Rare but still does happen. Hope these ideas help your situation.

Answer 2

Did the aligned the front end as well?
Maybe it could also be a lose rack (steering rack only at speeds)
Also, since the age of the vehicle, have them check the front steering for loseness end and retorque front suspension. Rubber bushings tend to losen up with age, leaving a small gap that becomes more pronounce at higher speeds.

Answer 3

Tie rods, ball joints, bad tire.

Answer 4

bad cv joint or u joint have it rechecked