ok so i drive 220 miles round trip meeting my dad and within a mile from the house on the way back, my input shaft bearing seizes. once the tranny cooled down it broke loose drags when the tranny is in neutral the truck tries to go backwards. is it a bent mainshaft or a bent fork. need help bad i miss the ol tarmac. would it be cheaper to find a new tranny or to go and rebuild it? and what would the probable causes be?