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Valve Body & Pressure Switches: Removal

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  1. Ensure that removal of the valve body is necessary before proceeding. The following components can be serviced without removing the valve body from the transmission:
    1. The torque converter clutch solenoid (1).
    2. The pressure control solenoid (2).
    3. The internal wiring harness (3).
    4. The 2-3 shift solenoid (4).
    5. The 1-2 shift solenoid (5).
    6. The transmission fluid pressure manual valve position switch (6).
    7. The 3-2 shift solenoid (7).
    8. The torque converter clutch pulse width modulation (TCC PWM) solenoid (8).

    Refer to illustration for component identification. See Fig 1 .

  2. Remove the fluid level indicator. Raise and support the vehicle. Remove the oil pan, gasket and filter. See DRAINING & REFILLING  under LUBRICATION.
  3. Disconnect the internal wiring harness electrical connectors from the following components: transmission fluid pressure manual valve position switch, 1-2 shift solenoid, 2-3 shift solenoid, pressure control solenoid, TCC PWM solenoid and 3-2 shift solenoid. See Fig 2 .
  4. Remove the fluid indicator stop bracket bolt (2). Remove the fluid indicator bracket (1). See Fig 3 . Remove the TCC PWM solenoid retainer (2) with a small screwdriver. Rotate the solenoid (1) in the bore, if necessary, until the flat part of the retainer (2) is visible. See Fig 4 . Remove the TCC PWM solenoid (1) in order to access the TCC solenoid retaining bolts.
  5. Remove the TCC solenoid retaining bolts. Remove the TCC solenoid (with O-ring seal) and wiring harness from the control valve body. See Fig 5 and Fig 6 . Reposition the harness to the side of the transmission case.
  6. Remove the control valve body bolts which retain the transmission fluid pressure switch to the control valve body. Remove the transmission fluid pressure switch. Inspect the transmission fluid pressure switch for damage or debris. See Fig 7 .
  7. Remove the manual detent spring retaining bolt. Remove the manual detent spring. Inspect the manual detent spring for cracks or damage.
    CAUTION: Keep the control valve body level when lowering it from the vehicle. This will prevent the loss of check balls located in the control valve body passages.
  8. Remove the remaining control valve body bolts. Carefully begin to lower the control valve body down from the transmission case while simultaneously disconnecting the manual valve link. See Fig 8 . If disassembly, cleaning, inspection and assembly of the control valve body is necessary, see appropriate OVERHAUL article.
Fig 1: Identifying Serviceable Components
G00056986Courtesy of GENERAL MOTORS CORP.
Fig 2: Locating Valve Body Solenoids
G99A03602Courtesy of GENERAL MOTORS CORP.
Fig 3: Removing/Installing Fluid Indicator Stop Bracket
G00056987Courtesy of GENERAL MOTORS CORP.
Fig 4: Removing/Installing TCC PWM Solenoid
G00056988Courtesy of GENERAL MOTORS CORP.
Fig 5: Removing/Installing TCC Solenoid
G00056989Courtesy of GENERAL MOTORS CORP.
Fig 6: Removing/Installing Valve Body Wire Harness
G00056990Courtesy of GENERAL MOTORS CORP.
Fig 7: Removing/Installing Transmission Fluid Pressure Switch
G00056991Courtesy of GENERAL MOTORS CORP.
Fig 8: Removing/Installing Valve Body Assembly
G00056992Courtesy of GENERAL MOTORS CORP.
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