Quote Originally Posted by Aries_Turbo View Post
the ultimate downfall of the 604/41TE in a high horsepower application is the slow speed of clutch engagement/disengagement during shifts when the trans controller is calibrated for factory specs (ie smooth, slow shifting) but the engine is making much more power.

the clutches slip alot then and the trans burns up.

in other words, lots of HP and slow shifts = ruined transmission.

i would think the primary overall goal of reverse engineering the TCU would be tuning the shift speed to be much faster so the trans would last under high boost/high torque in 1-3 gears.

does that make sense? if not i can take a different route to explain it.

Brian
Well, situational shift control would be it. Don't ruin the transmission any more than required for street driving. Racer Steve made some valve body adjustments. Automatic 4th gear lockout too. Signal output to cut power on shift too!