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Home >> Isuzu >> 2007 >> Ascender 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 274 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Repair Instructions - Off Vehicle >> Control Valve Body Installation >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Secondary Fluid Pump Connector
    GM1552971Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Secondary fluid pump connector (1) is used for M33 models only, connector (2) is used on ISS models.
  1. Inspect the wiring harness and solenoid assembly for the following conditions:
    • Damage
    • Cracked connectors
    • Exposed wires
    • Loose electrical terminals
    • Damaged wiring loom and conduit
    • Worn, missing, or cut pass-through connector O-ring seal.
  2. Install the transmission wiring harness pass-through connector into the transmission case. Ensure connector tabs lock into place.
  3. Move the harness to one side in order to install the valve body.
    4. Fig 2: Identifying Checkball Installation Positions
    GM7741Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Valve bodies are model dependent.
  4. Install the ball check valves (2-6, 8, 12) in the valve body and retain ball check valves with J 36850  or an equivalent. See Special Tools .
    5. Fig 3: Installing Valve Body
    GM7742Courtesy of GENERAL MOTORS CORP.
    NOTE: Be sure all solenoids are installed with the electrical connectors facing the non-machined (cast) side of the valve body; otherwise, the solenoids will bind against the transmission case as the valve body bolts are tightened and damage may occur.
  5. Install the valve body over the J 25025-5  , and connect the manual valve link to the manual valve. See Special Tools .
  6. Install 2 valve body bolts to hold the valve body in place.
  7. Remove the J 25025-5  . See Special Tools .
    8. Fig 4: View Of Valve Body Bolts
    GM1462820Courtesy of GENERAL MOTORS CORP.
  8. Install the valve body bolts (62) that are shown only.
  9. Finger tighten the bolts.
    10. Fig 5: Inspection Areas On Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly
    GM829178Courtesy of GENERAL MOTORS CORP.
  10. Inspect the transmission fluid pressure (TFP) manual valve position switch assembly for the following conditions:
    • Damage
    • Debris
    • Damaged or missing O-rings
    • Cracked connector
    • Loose electrical terminals
    • Poor terminal retention
    • Sediment in switch membrane
    11. Fig 6: View Of TFP Manual Valve Position Switch & Retaining Bolts
    GM829171Courtesy of GENERAL MOTORS CORP.
  11. Install the TFP manual valve position switch (69) and bolts (62, 70).
    12. Fig 7: View Of TCC Solenoid Bolts
    GM1552915Courtesy of GENERAL MOTORS CORP.
  12. Install the transmission wiring harness on the valve body.
    13. NOTE: Refer to Fastener Notice .
  13. Install the torque converter clutch (TCC) solenoid valve and bolts (68).

    Tighten:  Tighten the bolts to 8-14 N.m (6-10 lb ft).

    14. Fig 8: Locating Valve Body Bolts
    GM1220976Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not over-tighten the bolts. Over-tightening the bolts will distort the valve bores. Begin tightening from the center of the valve body tighten the bolts in a outward direction.
  14. Inspect to ensure all of the valve body bolts are in the correct location.

    Each bolt number refers to a specific bolt size, as indicated in the following list:

    • 1 - M6 x 1.0 x 65.0
    • 2 - M6 x 1.0 x 54.4
    • 3 - M6 x 1.0 x 47.5
    • 4 - M6 x 1.0 x 17.7
    • 5 - M6 x 1.0 x 35.0
  15. Tighten the bolts from the center of the valve body working your way out in a spiral pattern to the outside edge.

    Tighten:  Tighten the bolts to 8-14 N.m (6-10 lb ft).

    16. Fig 9: View Of TCC/PWM Solenoid & Clip
    GM405022Courtesy of GENERAL MOTORS CORP.
  16. Install the torque converter clutch pulse width modulation (TCC PWM) solenoid valve (396) and the solenoid retainer (395).
    17. Fig 10: View of Electrical Connectors
    GM1552913Courtesy of GENERAL MOTORS CORP.
  17. Snap the wiring harness in place on the valve body bolts. Ensure the harness loom tab is located under the TFP switch.
  18. Install the wiring connectors to the electrical components as indicated in the following list:
    • 1 - TFP manual valve position switch
    • 2 - 1-2 shift solenoid
    • 3 - 2-3 shift solenoid
    • 4 - pressure control solenoid (PCS)
    • 5 - TCC PWM solenoid
    • 6 - 3-2 shift solenoid
    • 7 - input speed sensor (ISS)
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