Control Valve Body: Removal

Remove the case side cover. See CASE SIDE COVER . Remove the oil pump. See OIL PUMP . Remove the valve body bolts (374-381 and 384). See Fig 1 .
Remove the valve body (300) while keeping the spacer plate (370) with the transaxle. See Fig 2 . Remove the ball check valves (372 and 373) from the valve body. See Fig 3 .
CAUTION: Carefully remove the valve body or the ball check valves will fall out.
Remove the spacer plate (370) and gasket. See Fig 4 . Remove the ball check valves (372) from the case cover. See Fig 5 . Inspect each check valve seat in the spacer plate (370) for excessive peening. See Fig 6 .
Place a ball check valve (372) on each seat and use a flashlight in order to look for visible light between the valve and the seat. Inspect all components removed from the transaxle. See appropriate OVERHAUL article.

Fig 1: Identifying Valve Body Bolts

Courtesy of GENERAL MOTORS CORP.

Fig 2: Removing & Installing Control Valve Body Assembly

Courtesy of GENERAL MOTORS CORP.

Fig 3: Locating Check Balls In Valve Body

Courtesy of GENERAL MOTORS CORP.

Fig 4: Identifying Spacer Plate

Courtesy of GENERAL MOTORS CORP.

Fig 5: Locating Check Balls In Case Cover

Courtesy of GENERAL MOTORS CORP.

Fig 6: Inspecting Check Valve Seats In Spacer Plate

Courtesy of GENERAL MOTORS CORP.