ok, my jimmy had the tranny re-built less than a year ago, and it already feels like i blew it out. i have stock tires, stock ears and a stock engine. the trannsmission trys very hard to shift into second, then the same into third. somtimes i have to floor it up to 35 to get into second. then this morning, it started not to respond to my thriottle. i was at 25, after it had shifted out of first. i was going up a hil. it started making a grining noise and it would not speed up or anything. when igot to the top of the hill, i stoped and the truck died. can anyone help me with this problem? i am clueless.