Case Components Disassemble

Inspect the transmission vent assembly for damage or being plugged. If the vent is damaged the torque converter housing (227) must be replaced.

Fig 1: View Of Torque Converter Housing
Courtesy of GENERAL MOTORS CORP.
Remove the pressure test plug (40).
Remove the level hole plug (36) and fluid level hole plug O-ring (37) from the case (604).

Fig 2: Removing Level Hole Plug & Fluid Level Hole Plug O-Ring
Courtesy of GENERAL MOTORS CORP.