mysterious pop from front end only as body rolls or twists. unhooked sway bar thinking it was a bushing it wasnt tht it just made it worse could it be a control arm bushing or a track bar. also what is the life expectancy for a dana 70 rear. The truck is a 2001 2500 4x4 ex cab short bed. its all stock except for a leveling kit and 35s and a fass.