I have a 1994 ford bronco that is a prerunner. it has the front traction beams that are 8 inches wider with kings and front caged and rear end done. when i drilled the wholes for the radious arms i hit two wires and cut them. That caused the speedometer not to work and the transmission jumped when it shifted. After I replaced the rearend it does it again.I was wondering if there is any wiring at all that plugs into the rear end that might cause this to happen.let me know if you know anything about this problem. thanks a lot.