99 Silverado 1500 2WD 5.3

It shifts considerably more firm in tow/haul mode. How much TM does the general remove for tow/haul mode, if any?

In regular mode it seems a little sloppy at full throttle 5200 but good at 3/4 throttle up to 4200. It only has 147K.

Tow/haul mode is positive at full throttle.