Hummer H2. Manual — part 2359

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Excessive end play.

2. Install the J 35138 , the. See Special Tools and Equipment . J 26900-13 and the J 8001 or J 39195 to be

used with the 300 mm torque converter. See Special Tools and Equipment .

Specification:

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The end play for a 245 mm torque converter should be 0-0.38 mm (0-0.015 in).

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The end play for a 298 mm torque converter should be 0.1-0.48 mm (0.004-0.019 in).

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The end play for a 258 mm and 300 mm torque converter should be 0.1-0.5 mm (0.004-0.020 in).

3. Remove the tools.

TORQUE CONVERTER INSTALLATION

Tools Required

J 21366 Converter Holding Strap

IMPORTANT: The torque converter should not be replaced if the fluid has an odor,

discoloration or no evidence of metal or clutch plate material.
Flushing the torque converter is not recommended.

CAUTION: The torque converter weighs approximately 65 lbs. Personal injury

may result if you lift the torque converter improperly.

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

Fig. 462: Installing Torque Converter
Courtesy of GENERAL MOTORS CORP.

1. Install the torque converter.

2. Install the J 21366 .

HOLDING FIXTURE REMOVAL

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

Tools Required

J 8763-B Holding Fixture and Base. See Special Tools and Equipment .

Fig. 463: J 8763-02 & Transmission
Courtesy of GENERAL MOTORS CORP.

Remove the transmission from the J 8763-B . See Special Tools and Equipment .

DESCRIPTION AND OPERATION

PARK - ENGINE RUNNING

With the gear selector lever in the PARK (P) position and the engine running, the line pressure from the oil
pump assembly is directed to various components in the valve body and the oil pump.

Pressure Regulator Valve

The pressure regulator valve regulates the oil pump output (line pressure) in response to the signal fluid
pressure, the spring force and the line pressure acting on the end of the valve. The line pressure is routed

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

through the valve and into both the converter feed and the decrease fluid circuits. Regulated line pressure is also
directed to the manual valve, the converter clutch valve, the actuator feed limit valve, and the regulated apply
valve.

Pressure Relief Valve

Controlled by spring force, this checkball limits the maximum value of the line pressure. When the line pressure
reaches this limiting value, fluid is exhausted past the ball and returns to the sump.

Line Pressure Tap

The line pressure tap provides a location to measure the line pressure with a fluid pressure gauge.

Actuator Feed Limit Valve

Biased by spring force and orificed AFL fluid, it limits the maximum value of line pressure entering the AFL
fluid circuit. Below this limiting value, the AFL fluid pressure equals the line pressure. The AFL fluid is routed
to the pressure control solenoid valve, the 3-2 control solenoid valve, the TCC PWM solenoid valve, the 1-2
and 2-3 shift solenoid valves, and the 2-3 shift valve train.

Pressure Control (PC) Solenoid Valve

Controlled by the powertrain control module (PCM), the PC solenoid valve regulates the filtered AFL fluid into
the torque signal fluid pressure. The PCM controls this regulation by varying the current value to the PC
solenoid valve in relation to the throttle position and other vehicle operating conditions.

Torque Converter Clutch (TCC)

Torque Converter Clutch PWM Solenoid and Regulator Apply and Isolator Valve

AFL fluid is routed to the TCC PWM solenoid valve, in Park the PCM has the duty cycle turned OFF. This
prevents AFL fluid from entering the converter clutch signal fluid circuit. Regulated line pressure is routed to
the regulator apply valve, which is open with CC signal circuit empty, and blocks line pressure from entering
the regulated apply circuit. Any fluid in the regulated apply circuit will exhaust at the regulated apply valve.

TCC Solenoid Valve

Under normal operating conditions, the PCM keeps the normally open TCC solenoid valve de-energized (OFF).
Converter feed fluid exhausts through the open TCC solenoid valve, and spring force keeps the converter clutch
apply valve in the release position.

Converter Clutch Valve

IMPORTANT: TCC converter feed valve assembly (#4), in the converter feed circuit, prevents

converter drain down. The orifice is smaller than the exhaust through the TCC
solenoid valve. Therefore, fluid pressure does not build up at the end of the
converter clutch apply valve.

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2