Diablo Programmer

[SummitUp]

Originally Posted by L2C

what is torque management feature

In 1996-1997, GM introduced a new PCM feature called Torque Management (a.k.a. TM). This feature was designed to extend the service life of automatic transmissions by removing a certain amount of timing advance temporarily before beginning the shift between gears. The effect is there is less wear and tear on the transmission because not as much power is being run through the transmission while the clutches and bands are engaging/disengaging.

However, TM also reduces performance, and removing it, especially in the trucks, can produce a noticible improvement in performance.

Or as the folks at Diablo say:

"TM is basically GM's way of putting an end to the fun before it gets started. There are several different scenarios that bring TM into play. Among these are "abusive launches" and WOT (wide open throttle) upshifts/downshifts. When TM is enabled, the PCM thinks you are being abusive, and either pulls timing or closes the throttle body on ETC trucks to kill power. You may drive forever without ever realizing what TM is or does, until you experience a vehicle back-to-back with the TM removed....major difference. By applying the Predator tunes we improve the throttle response in these electronic throttle body vehicles drastically...if you command WOT with your right foot, you get WOT, not what the PCM feels like giving you!"