If you install a PCM that's capable of running PMT1 programming (don't confuse PMT1 with PMT2/3 because in certain situations, there are characteristics of PMT1 that are far superior to PMT2/3) you will notice a BIG difference in the way the torque converter clutch apply/release strategy is handled between your XLE4 and the PMT1.
As for the high pressure oil pump, it's not something that's an "upgrade". I hate that word because it's used to mean "something that's better than stock". While many of the aftermarket replacement pumps for the 7.3L move more oil than the stock piece will, the only time you will notice that you're moving more oil is under high power demand conditions. The truck will run exactly the same under normal driving conditions. Keep in mind that if you install the pump and have a rolling idle issue afterward, you'll have to pay for custom tuning to take the RPM fluctuation out of it. It's not a problem, but it can be annoying to some folks. Otherwise, the truck will run fine.
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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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