[JB36]

My car was professionally aligned and corner balance by a reputable Porsche shop over the summer. Since then I brought the car back because the steering wheel became off centered. It was straightened out and I just have done my second auto-cross today. The steering wheel was fine until I left the parking lot. If 12 o'clock is centered, it's now in the 2 o'clock position when straight. The car drives straight. I'm thinking maybe the U bolts on the steering shaft are loosing their grip on the shaft. Has anyone had this problem? Thanks