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Control Valve Body: Removal

  1. Remove the case side cover. See CASE SIDE COVER  .
  2. Remove the oil pump. See OIL PUMP  .
  3. Remove the valve body bolts (374-381 and 384). See Fig 1 .
    CAUTION: Carefully remove the valve body or the ball check valves will fall out.
  4. Remove the valve body (300) while keeping the spacer plate (370) with the transaxle. See Fig 2 .
  5. Remove the ball check valves (372 and 373) from the valve body. See Fig 3 .
  6. Remove the spacer plate (370) and gasket. See Fig 4 .
  7. Remove the ball check valves (372) from the case cover. See Fig 5 .
  8. 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.
  9. Inspect all components removed from the transaxle. See appropriate OVERHAUL article.
Fig 1: Identifying Valve Body Bolts
G00087748Courtesy of GENERAL MOTORS CORP.
Fig 2: Removing & Installing Control Valve Body Assembly
G00057605Courtesy of GENERAL MOTORS CORP.
Fig 3: Locating Check Balls In Valve Body
G00087750Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying Spacer Plate
G00087751Courtesy of GENERAL MOTORS CORP.
Fig 5: Locating Check Balls In Case Cover
G00087752Courtesy of GENERAL MOTORS CORP.
Fig 6: Inspecting Check Valve Seats In Spacer Plate
G00087753Courtesy of GENERAL MOTORS CORP.
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