P0351:
Ignition coil #1 Primary circuit - Peak primary circuit current not achieved with maximum dwell time
P0753: Trans. 3-4 shift sol/trans relay circuits - an open or shorted condition detected in the overdrive solenoid control circuit or Trans relay circuit in JTEC RE transmissions
P0743: Torque converter clutch solenoid/ trans relay circuits - An open or shorted condition detected in the torque converter part throttle unlock solenoid control circuit
Sounds like you got a couple problems going on here, however it's possible the trans. codes are related to the coil code. It might be possible your coil is going out. I'm assuming the truck was hot when this happened, right? If so, that's a sign the coil is going out. They like to start crapping out when then start getting hot, but run fine when they're cold.
