Steering shaking 50mph+
Got the car used. From day one steering jerks left to right back n forth. Took it to dealer and they said i had a minor cuppig on the tires which is the cause. I then got hew rims and tires. Still shakes and jerks back n forth. I took it to get alignmen and same issue still exist. So today i went to get te new wheels and tirees rebalanced at a different shop. Shop said they are at ero which means its good. But same issue is there. What is wrong with my car? What else could be causing this??