I should clarify - I built the transmission in this car, and I installed a TransGo HD2 kit and physically disabled the PWM control of TCC lockup in the valvebody while I was in it. I put the switch in because at the time I was not aware of how much you coul do via programming. The TCC never automatically locked on this car ever since the day I bought it. Maybe I should start another thread on that?

On a side note, honestly, if I had to do it all over again, I'd put the Sonnax fix in and re-enable PWM control as the part-throttle TCC apply can get pretty harsh. The other thing I found out is that the stock TCC regulator valve limits TCC internal pressure to 80psi, but when you lock it open like the common redneck fix was, you let full line pressure hit this 12" diameter converter - that's a lot of surface area for that pressure to act on and push between the transmission and the engine.