Transmission tuning with HP tuners and LS engine swaps.

Really nicely built/restored willies with a late model 5.3 swap showed up for some trans tuning. The factory calibrations for these transmissions like to hold off on a downshift alot longer then you really want sometimes, also the shift firmness properties and upshift at wot scheduals really need a little work to make feel right. A little time with HP tuners and we are much happier with how the trans operates. Also this swap used an on off electric fan arangement where the factory fan was a pulse width modulated assembly. So anytime the fan was commended the poor 30 amp relay got a seriouse HZ workout. By modifying the PWM tables to command 100%duty cycle when we wanted the fan on got that problem taken care of and allowed the realy to operate properly.
Super nice truck