We can certainly do programming for a truck and not mess with the shift firmness, shift points, or both. It's very common to have shifts that are too harsh when using aftermarket programming along with modified transmissions.
We can't reprogram the Superchips flash programmers, but we can reburn the gold chips that Superchips used to sell.
We don't do "decel" tunes due to possible transmission problems, but it sounds as though your friend has a plan to simply wire the exhaust backpressure valve solenoid to a switch.
We no longer offer a programmer for the 7.3L that just holds tunes (Evo2 or Standard Gryphon), but we can reflash the PCM with a custom calibration built to his specifications.
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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.
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