I folks, I am a hobbyist tuner, not a pro.
The above truck [mine]has the mentioned tranny issues.
It surges rpm about 150-200 rpm on steady throttle driving.
Worst, it has a noticeable shutter, the whole truck shakes at steady speed, light load driving, in high gear, this shutter lasts 2-3 seconds and with cycles every
few minutes if the steady speed/load is maintained.
I would have looked at TCC Duty Cycle to fix that, I could be wrong, but that doesn't seem to exist in 2.25 or3.0.
Any advice?