Hey guys just wanted to share what finally fixed my issues with my TCC after a 80E swap. Last year i swapped out my 4l60E in my 00 RCSB silverado for a 4l80E i built. Everything went great as I had Wheatley tune the PCM and put a new Circle D 3K stall in. The only catch was the TCC would disengage after 10 seconds of being locked up followed by the dreaded P0300 code. With a tech2 on it commanding the TCC on it would stay locked up for 10+ miles eliminating any hydraulic issues. I switched wires, plugs, cleaned the MAF, changed the intake gaskets, cleaned the TB: all in vain! still a P0300 with absolutely no misses or performance issues. I posted on here numerous times with no one able to help. I suspected the new converter had a slight vibration tricking the PCM into thinking there was a misfire and i'll be damned if i was gonna leave out my new kick *** converter so I had Charlie disable the P0300. However the TCC still did the same thing just without the SES light!! I dont know what possessed me to do a crankshaft position relearn but that did the trick! I hope this helps anyone else that has swap issues!

 

cool, glad you got it figured out!

Thanks for sharing

 

Thanks man! I feel like I should have known to do that right off the bat.