I set up some switches to control my shift solenoids. If I start to use them, I need to keep using them until I turn off the car because the PCM forces limp mode. Essentially I am cutting off the PCM's comunication and just sending twelve volts to what ever solenoids need to be active for each gear change. What I found is that the pcm's shifting was pretty much the most effcient for my car. Now if I could lock the TCC in second gear then I could probably improve over the stock pcm shifting, however my TCC is not very robust and it's too much of a risk because I'd have to accelerate pretty briskly to take advantage of the locked TCC which could kill it.
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