You want to make sure whatever surface the band rides on is true before putting that wider band on as well. I believe I found the cause of my lockup issues, and I feel like an idiot. I'd looked over the lockup tables before, but this time I noticed a significant divergence between the 1500 and dually around 55 mph which is where it's the worst. I also captured a log where it took 5 throttle lifts to get it to lock. Seat if the pants said it should lock, but TP and VSS determined that was a lie. I guess I just don't realize how deep my foot is in it with this truck all loaded down. So I stole the mid and high end lockup scheme from the 1500, tweaked the bottom end, blended the 2, and now I need a test drive to see if it's what I wanted. If not, I have a big transmission pid list saved to once again objectively determine why not. The list has tstate conditions which have a yes/no to not locked because of downshift, tp change, slippage, etc. All that was good to go, and when it did command a lockup it always happened quickly so at least that much seems to not be a mechanical issue. I will need to get an external gauge to compare actual line pressure to commanded.