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.
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes.
SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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