Try only making right turns. UPS has there drivers do it as it is more efficient than waiting for left turn signals in the city. Haha with what your describing I would look at the wheel bearing first. I can't think of anything else that would cause a rotational vibration under load.
|Carbon Fiber Intake|AA GEN3|AC Strut Brace|Eibach/Koni's|CSL/SMG Flash|
|Victory UDP's|HPF Sub Frame Plates| PF Subframe Bushings|Rtab Limiters|