LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Repair Instructions >> Valve Body and Pressure Switch Replacement >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure that removal of the valve body is necessary before proceeding.

    Important:  The following components can be serviced without removing the valve body from the transmission:

    • The 2-3 solenoid (1)
    • The internal wiring harness (2)
    • The 1-2 shift solenoid (3)
    • The transmission fluid temperature sensor (4)
    • The transmission fluid pressure manual valve position switch (5)
    • The pressure control solenoid (6)
    • The torque converter clutch pulse width modulation (TCC PWM) solenoid (7)
    Fig 1: Identifying Serviceable Components
    G02424568Courtesy of GENERAL MOTORS CORP.
  2. Remove the fluid level indicator.
  3. Raise the vehicle.
  4. Remove the oil pan, gasket, and filter. Refer to Automatic Transmission Fluid/Filter Replacement .
    Fig 2: Removing Oil Filter
    G02424569Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the internal wire harness from the transmission fluid pressure (TFP) manual valve position switch.

    Important:  Use care not to loose the 5 O-rings that are located between the TFP manual valve position switch and the valve body.

  6. Remove the control valve body bolts (1) that retain the (TFP) manual valve position switch (2) to the control valve body.
  7. Remove the TFP manual valve position switch.
  8. Disconnect the internal wiring harness electrical connectors from the remaining valve body electrical components.
    Fig 3: Removing Control Valve Body Bolts & Manual Valve Position Switch
    G02424570Courtesy of GENERAL MOTORS CORP.
  9. Remove the lube oil pipe bolt (6) and retainer (7).
  10. Remove the lube oil pipe (5).
  11. Remove the bolts and remove the manual shaft detent spring (3).

    Important:  Keep the control valve body level when lowering it from the vehicle. This will prevent the loss of checkballs located in the transmission case passages.

  12. Remove the remaining control valve body bolts.
  13. Carefully lower the valve body down from the transmission case. Use care not to drop the manual shaft valve.
  14. Remove the control valve assembly (2) which includes the following:
    • The accumulator housing assembly (1)
    • The control valve assembly to the spacer plate gasket
    • The spacer plate
    15. Fig 4: Removing Lube Oil Pipe Components, Manual Shaft Detent Spring & Control Valve Assembly
    G02424571Courtesy of GENERAL MOTORS CORP.
  15. Remove the manual valve (1) from the control valve body.
  16. Inspect the manual valve for nicks and burrs.
    Fig 5: Removing Manual Valve
    G02424572Courtesy of GENERAL MOTORS CORP.
  17. Remove the spacer plate to case gasket (2) from the case. The gasket may stick to the spacer plate.
  18. Remove the PWM screen (1) from the case passage.
    Fig 6: Removing Spacer Plate To Case Gasket & PWM Screen
    G02424573Courtesy of GENERAL MOTORS CORP.
  19. Remove the manual 2-1 band servo assembly (1).
  20. Remove the servo piston cushion spring (2).
    Fig 7: Removing Manual 2-1 Band Servo Assembly & Servo Piston Cushion Spring
    G02424574Courtesy of GENERAL MOTORS CORP.
  21. Remove the manual 2-1 band servo piston pin retainer ring (4).
  22. Remove the manual 2-1 band servo piston pin (1).
  23. Remove the manual 2-1 band servo piston seal (2).
    Fig 8: Removing Manual 2-1 Band Servo Piston Pin Retainer Ring, Pin & Seal
    G02424575Courtesy of GENERAL MOTORS CORP.

    Important:  Do not use a magnet in order to remove the checkballs. Using a magnet to remove the checkballs may magnetize the checkballs, causing metal particles to stick.

  24. Remove the eight checkballs (nine checkballs for some models).
    Fig 9: Removing Checkballs
    G02424576Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals