What is the indicator that the half shafts need replaced? I had serious steering wheel wobble a while back, my father in-law, mechanic, convinced me to change the driver side out. we did and it seemed to help along with new tires. now the steering wheel does not wobble but the car shakes or shudders under light acceleration between 50 and 65 mph. i'm wondering if the passenger side now needs replaced or if this is a different issue all together.