AT-64 AUTOMATIC TRANSMISSION — Removal of Component Parts SST (i) Insert SST behind No. 1 brake piston and gradually lift it out of the transmission case. SST 09350-30020 (09350-07090) (j) Remove the two O-rings from No. 1 piston. 40. REMOVE MANUAL VALVE LEVER, SHAFT AND OIL SEALS (a) Using a chisel, cut off the spacer and remove it from the shaft. (b) Using a pin punch, drive out the pin. (c) Pull the manual valve lever shaft out through the case and remove the lever. (d) Using a screwdriver, remove the two oil seals.