[jjzepplin]

What roll pins do you speak of? You could try pushing the truck forward and reverse a couple times. Might try to jack up the rear end and put on jackstands, Then crank the engine in reverse rotation to try to dislodge the offender. Did you drain the fluid in the tranny after the breakage of said pins? I would glue a magnet to a copper wire and put a bend in it to fish around in the case from the drain plug to remove any pieces of pin.