something is binding up

I put my enlarged shackles on that i got from Quadratec, now it sounds like some thing is binding in the rear anybody else ever have this happen

it could be your rear pinion angle..i know chris (91dejeeper) had problems with his pinion angle when he put his bigger shackles in the rear..he had to get different shims to change the angle..it might be worth sending him a pm

thanks