We also upgraded the transmission valvebody. Begin by draining the fluid and removing the pan. Once you have the pan off, you need to remove the filter, unhook the shifter linkage, and take out the bolts that hold the valvebody in place. Keep in mind, the bolts are different lengths and go in the same locations as removed. As you are lowering the valvebody, be careful not to lose the accumulator piston spring. It will fall out, just note where it goes to reinstall it.