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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1788 (Automatic Transmission - 4L60-E/4L65-E (Diagnosis)) >> Diagnostic Information and Procedures >> Shift Solenoid Leak Test >> Leak Test Procedure

Leak Test Procedure

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.

Important: 

  1. Remove the shift solenoid valve from the control valve body or the TCC solenoid valve from the transmission case. Refer to CONTROL & SHIFT SOLENOIDS or TCC PWM SOLENOID, TCC SOLENOID & WIRING HARNESS .
    Fig 1: Installing TCC Solenoid Valve, 1-2 SS Valve Or 2-3 SS Valve Into Bore #2
    G02131566Courtesy of GENERAL MOTORS CORP.
  2. Install the TCC solenoid valve, the 1-2 shift solenoid valve or the 2-3 shift solenoid valve into bore number 2 of the J 44246  and install the factory retainer clip to retain the solenoid.
    Fig 2: Applying Battery Positive & Negative To TCC On/Off Solenoid Wiring Harness Using Connector Test Adapter Kit
    G02131567Courtesy of GENERAL MOTORS CORP.

    Important:  The supplied solenoid testing harness will not power the 4L60-E TCC On/Off solenoid. To energize this solenoid, apply battery, 12 V, positive and negative (-) to the TCC On/Off solenoid wiring harness using connector test adapter kit J 35616-A  . Use terminal E, Red, Power, and terminal T, Black, Ground. Refer to the Automatic Transmission Inline 20-Way Connector End View .

  3. Connect the solenoid testing harness supplied with the J 44246  to the solenoid.

    Important:  Do not use air pressure in excess of 827.4 kPa (120 psi). Excessive pressure will not allow the solenoid ball check valve to seat properly. Recommended air pressure is 344.75 kPa (50 psi).

  4. Apply compressed air to the J 44246  .
  5. Air should flow through the solenoid. If air does not flow through the solenoid, replace the solenoid. Refer to CONTROL & SHIFT SOLENOIDS .
  6. Connect the solenoid testing harness to the, 12 volt, positive and negative (-) battery terminals.
  7. Observe if the solenoid is operating electrically. An audible clicking noise can be heard when connecting or disconnecting power.

    Important: 

    • All solenoids need to be energized to seal.
    • A small amount of air leakage is normal +/- 21 kPa (+/- 3 psi).
  8. Observe the air flow through the solenoid. The flow will completely or nearly completely stop. Replace the solenoid if there continues to be an obvious air leak when the solenoid is energized.

    Important:  Inspect the O-rings after the test to be sure that they are not cut or damaged.

  9. Install the shift solenoid valve into the control valve body or the TCC solenoid valve into the transmission case. Refer to CONTROL & SHIFT SOLENOIDS or TCC PWM SOLENOID, TCC SOLENOID & WIRING HARNESS .
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