Unplug the washer before beginning. Turn off the hot and cold water valves. Disconnect the water supply hoses from the back of the unit by unscrewing the connections. Disconnect the drain hose by unclamping it.
Pull the agitator top out of the washer tub. Pry off the agitator cap with the screwdriver. Pull out the dust cap if your unit has one. Use a socket wrench to remove the bolt that holds the agitator to the unit and pull the agitator out of the tub.
Place a towel or cloth on the floor behind the washer and tilt the washer back so that the back panel rests on the cloth to expose the motor.
Unsnap the pump clips and remove the pump from the motor shaft. Disconnect the motor wires and move them to the side. Use the socket wrench to remove the gear case from the rest of the unit. Pull the motor and gear case out of the unit.
Pull the thrust washer from the gear case shaft. Pry off the clutch support rings. Slide the clutch off the gear case shaft. Unscrew and unclip the motor. Pull off the isolator and pry out the coupler clog. Unscrew the motor plate.
Attach the motor plate to the new gear case. Install the coupler clog and isolator to the new part. Attach the motor and clutch. Attach the clutch support rings and thrust washer. Reassemble the washer and reconnect the hoses and restore power.