LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 356 (Automatic Transmission Servicing) >> Removal & Installation >> Valve Body & Pressure Switch >> Removal

Valve Body & Pressure Switch: Removal

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure removal of the valve body is necessary before proceeding. The following components can be serviced without removing the valve body from the transmission:
    • Torque Converter Clutch Solenoid (1)
    • Pressure Control Solenoid (2)
    • Internal Wiring Harness (3)
    • 2-3 Shift Solenoid (4)
    • 1-2 Shift Solenoid (5)
    • Transmission Fluid Pressure Manual Valve Position Switch (6)
    • 3-2 Shift Solenoid (7)
    • Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid (8)

    See Fig 1 .

  2. Remove the fluid level indicator.
  3. Raise and support the vehicle.
  4. Remove the oil pan, gasket and filter. See DRAINING & REFILLING  under LUBRICATION.
  5. Disconnect the internal wiring harness electrical connectors from the following components:
    • Transmission fluid pressure manual valve position switch (1).
    • 1-2 shift solenoid (2).
    • 2-3 shift solenoid (3).
    • Pressure control solenoid (4).
    • TCC PWM solenoid (5).
    • 3-2 shift solenoid (6).
  6. Remove the fluid indicator stop bracket bolt (2). See Fig 2 .
  7. Remove the fluid indicator bracket (1).
  8. 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.
  9. Remove the TCC PWM solenoid (1) to access the TCC solenoid retaining bolts. See Figure .
  10. Remove the TCC solenoid retaining bolts. See Fig 3 .
  11. Remove the TCC solenoid (with "O" ring seal) and wiring harness from the control valve body.
  12. Reposition the harness to the side of the transmission case. See Figure .
  13. Remove the control valve body bolts which retain the transmission fluid pressure switch to the control valve body. See Fig 4 .
  14. Remove the transmission fluid pressure switch.
  15. Inspect the transmission fluid pressure switch for damage or debris. See Fig 5 .
  16. Remove the manual detent spring retaining bolt.
  17. Remove the manual detent spring. See Fig 6 .
  18. Inspect the manual detent spring for cracks or damage.
    NOTE: Keep the control valve body level when lowering it from the vehicle. This will prevent the loss of checkballs located in the control valve body passages.
  19. Remove the remaining control valve body bolts.
  20. Carefully begin to lower the control valve body down from the transmission case while simultaneously disconnecting the manual valve link. See Fig 7 .
  21. If disassembly of the control valve body is necessary, see appropriate OVERHAUL article.
Fig 1: Internal View Of Serviceable Components
G00056986Courtesy of GENERAL MOTORS CORP.
Fig 2: Removing & Installing Fluid Indicator Stop
G00056987Courtesy of GENERAL MOTORS CORP.
Fig 3: Removing & Installing TCC Retainer Bolts
G00056989Courtesy of GENERAL MOTORS CORP.
Fig 4: Removing & Installing Fluid Pressure Switch Bolts
G00056991Courtesy of GENERAL MOTORS CORP.
Fig 5: Inspecting Fluid Pressure Switch For Damage
G00089856Courtesy of GENERAL MOTORS CORP.
Fig 6: Removing & Installing Manual Detent Lever
G00089857Courtesy of GENERAL MOTORS CORP.
Fig 7: Lowering & Raising Valve Body
G00056992Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals