The pump assembly received a new main pressure regulator and boost valve, which came with the Trans-Go reprogramming kit. The separator plate rests between the transmission case and the valvebody, and has 10 holes that require additional drilling. These are the pressure-apply and relief ports. Opening these up to 0.093 inch increases shift firmness and adjusts the timing of each shift. Straughn also suggests drilling out the solenoid A and B ports to 0.040 inch. He has found that this slightly increases shift time, which makes for a nice shift pattern on the street.