Hi everyone i have a question and i am just stumped. i was plowing with my 91 K1500 and it worked great for a while and the transmission start to slip really bad. Then it stop moving the RPM were up but it would not move. i cycled through all the gears PRND12 and it wouldn't move. i turned off the truck wait for five seconds and started it back up and it moved for like a couple of minutes. then it did the same thing. i can keep turning off the truck and it works of couple of minutes before stop working again. i dont know if it is the transmission, torque converter, tranny filter clogged up. if some buddy knows what it is please let me know.