Had tires at 35psi front, and 32psi rear on 265's. Launched at 13-14psi, Truck will pull through the brakes at anything higher. Not sure if the ML is loose enough for the S480. Got the fueling fixed Tom, as odd as it sounds, the shift happens exactly 600rpm from what the tune says..., so still working it out, but its the first 100% throttle pass the truck has seen. Would blow right past the shift with stock defuel and TLIQ tables, I messed with the WOT rpm/mph shifting and have it set down to 2800rpm and still clicks shifts off at 3200-3400. I loaded a +200uS tune in after it shifted smoothly and it started to pull fuel from when we were trying to get it to shift before, but atleast its doing what the tune says, not blowing right past a set shift point. Still full weight, ~ 7600 lbs. Removed spare and tailgate. Need to get it on a scale