Most probably the cause is tires (consult the previous item). Earlier the vehicle traveled straight because pulling to one side made by the tires was
balanced by pulling to another side made by the incorrect wheel alignment. When one cause was removed, pulling to one side appeared.
There can be several reasons
- Excessive play in steering wheel. When traveling there is left or right free play and this causes a minor steering wheel deviation.
- The vehicle has the rear axle turned. Wheel alignment was performed on the front axle without taking into account the rear axle shift.
- Rear cross camber is too high, especially when one wheel has a positive camber and another has a negative camber.
- Difference in tire pressure of rear/front wheels is too big.
- There are hidden chassis faults, which could not be detected before performing wheel alignment for one reason or another.
Note: if besides steering wheel free play the vehicle also pulls to one side, first remove the cause of pulling to one
side and then check for the proper steering wheel position.