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 while keeping the spacer plate with the transaxle. See Fig 2 . Remove the ball check valves (372 and 373) from the valve body. See Fig 3 .
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.
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. See Fig 6 . Inspect all components removed from the transaxle. See appropriate OVERHAUL article in AUTOMATIC TRANSMISSIONS.

Fig 1: Identifying Valve Body Bolts

Courtesy of GENERAL MOTORS CORP.

Fig 2: Removing & Installing Control Valve Body Assembly

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Fig 3: Locating Check Balls In Valve Body

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Fig 4: Identifying Spacer Plate

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Fig 5: Locating Check Balls In Case Cover

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Fig 6: Inspecting Check Valve Seats In Spacer Plate

Courtesy of GENERAL MOTORS CORP.