Hummer H3. Manual — part 725

SHIFT SOLENOID LEAK TEST

Tools Required

J 35616 GM Terminal Test Kit

J 44246 Solenoid Testing Kit. See Special Tools.

Leak Test Procedure

1. Remove the shift solenoid valve from the control valve body or the torque converter clutch

(TCC) solenoid valve from the transmission case. Refer to Control and Shift Solenoids
Replacement or Torque Converter Clutch Pulse Width Modulation Solenoid,
Torque Converter Clutch Solenoid and Wiring Harness.

IMPORTANT:

This procedure tests On/Off type solenoid valves.

Visually inspect the physical condition of the solenoid
before testing. Inspect the O-rings before and after the
test to be sure that they are not cut or damaged.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

Fig. 5: Installing Valve Into J 44246
Courtesy 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.
See Special Tools.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

Fig. 6: Connecting Solenoid Testing Harness To Solenoid
Courtesy 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-volt, positive (+) and negative (-) to the TCC
On/Off solenoid wiring harness using connector test adapter
kit J 35616 . Use terminal E, Red, Power and terminal T,
Black, Ground. Refer to the Automatic Transmission Inline
20-Way Connector End View .

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

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

Tools.

4. Apply compressed air to the J 44246 . See Special Tools.

5. Air should flow through the solenoid. If air does not flow through the solenoid, replace the

solenoid. Refer to Control and Shift Solenoids Replacement.

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.

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.

9. Install the shift solenoid valve into the control valve body or the TCC solenoid valve into

the transmission case. Refer to Control and Shift Solenoids Replacement or

Torque

Converter Clutch Pulse Width Modulation Solenoid, Torque Converter Clutch
Solenoid and Wiring Harness

.

TRANSMISSION FLUID COOLER FLUSHING AND FLOW TEST (J 45096)

GM studies indicate that plugged or restricted transmission oil coolers and pipes cause
insufficient transmission lubrication and elevated operating temperatures which can lead to
premature transmission failure. Many repeat repair cases could have been prevented by following
published procedures for transmission oil cooler flushing and flow checking. This procedure

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).

IMPORTANT:

All solenoids need to be energized to seal.

A small amount of air leakage is normal +/- 21 kPa (+/- 3
psi).

IMPORTANT: Inspect the O-rings after the test to be sure that they are not

cut or damaged.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3