Torque Management manages the interface between PCM and TCM purely electrical. So when you pump up the gas PCM I believe adjusts engine timing to allow tranny to catch up on downshift etc. Taking that out seperates the two. The engine goes and the tranny does its own thing. Basically its just an old fashioned tranny. The Sonnex boosts line pressure by tricking the the TCM ref voltages (its basically a 2.2k resistor in circuit that modifies the 4.75v ref signal to the TCM from the tranny pressure transducer) giving higher line pressures to the clutch packs so they hold gear fractionally longer.
Finally the shift kit strengthens the accumulator pistons in the valve body so the transmission line pressure matches the more rigid hold of the gears, shifts quicker therefore reducing heat and wear on tranny.
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