Alright just went for a quick 3 minute run and tried to recreate the bucking... 50 seconds to 1:20 was definitely part of it and all of the 2 minute...
Really any point between 1000 and 1500 rpm. I went for another drive (can post log if you think it'll help) and the bucking gets bad when i'm in the...
I did get it going. When I un pinned the 6l80 harness the 4l80 harness pinned to the exact spot as 6l80. I ran 12v to the dark blue accessory wake up...