The thing about the 4R100 vs. the E4OD is the addition of a turbine shaft speed sensor (input shaft speed) that allows the PCM to actually see the time (duration) for any shift. Yes, the PCM can increase or decrease the line pressure during a shift to accomodate the desired shift time. In the parameters, I think that the PCM is allowed a 20 PSI window + or - to compensate.
Then why change the TV pressures during shifts?
Go back to the IPR map vs. desired ICP way of thinking.
__________________
Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
|