Actually, going a bit against what was originally thought, the SuperDuty PCMs are able to adapt for actual shift times (how long it takes the shift to actually occur when commanded). If you look a bit deeper into the parameters, you'll see that the shift pressure adaptive limits are +/- 20 PSI. By turning those off (which I always do), whatever shift characteristics you program into shift times/pressures will remain forever.....and the PCM will not alter the shift pressures by itself. That's what I LOVE about the OBS PCMs......they do exactly what you tell them to do every time.
The anticipated shifting switch that I was talking about in the quoted post SHOULD cause the PCM to command a shift at a consistent speed every time, but it still varies. I don't know if it's something that can be taken out or not.
Heck, you never learn anything if you don't try!!! I just alter all sorts of stuff and see what happens. Obviously I stay away from anything that isn't defined or sounds dangerous.
Tue, May 11th, 2010, 12:57 PM
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