I have a friend of mine that I am trying to help out. I don't normally mess with Transmission shift points or anything because i don't know enough about it to do it properly. My buddy has this GMT800 platform 1500 that he had a shop do a 4l80e swap on. He used a 200 stall torque converter. I see they have some changes to the shift modifiers. But this thing hits 3-4 shift really hard. Like almost feels like something is broken. I have confirmed the fluid is good and have confirmed the wiring is correct. Does anyone have any insight? I haven't been able to grab a log file because I always have my kids with me and its a single cab truck.
4l80 truck tune.hpt