[Christ]

If you want to change the shift points in your Honda-matic (yeah, it's stupid, I know) transmission, you can just shift it manually. It won't hurt the transmission at all, especially now that you're effectively putting less power to the transmission than the original motor was.

You can also play with the transmission itself to create manual valve body, if you wanted to. Also, you can change the stall speed of the torque convertor, but that will affect your TC lockup as well. *You won't have it anymore*.

I'm not sure if you can modify the signals to or from the TCU to change the actual shift points of the transmission, but you can usually just change the sizing of the oil passages in the valve body so that the fluid doesn't build as much pressure as fast, which means that it won't shift at the same RPM. (Shifting is normally controlled by fluid pressure.)