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AUTOMATIC TRANSMISSION INLINE 20-WAY CONNECTOR DESCRIPTION

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Fig. 485: Identifying Automatic Transmission In-Line 20-Way Connector Courtesy of GENERAL MOTORS CORP. The transmission electrical connector is an important part of the transmission operating system Any interference with the electrical connection can cause the transmission to set diagnostic trouble codes or affect proper operation. The following items can affect the electrical connection: • Bent […]

ELECTRONIC COMPONENT DESCRIPTION

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1- 2 and 2-3 Shift Solenoid Valves Fig. 477: View Of 1-2 & 2-3 Shift Solenoid Valve Courtesy of GENERAL MOTORS CORP. The 1-2 and 2-3 shift solenoid valves (also called A and B solenoids) are identical devices that control the movement of the 1-2 and 2-3 shift valves. The 3-4 shift valve is not […]

TRANSMISSION ADAPTIVE FUNCTIONS

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The 4L60-E transmission utilizes a line pressure control system during upshifts to compensate for the normal wear of transmission components. By adjusting the line pressure, the powertrain control module (PCM)/transmission control module (TCM) can maintain acceptable transmission shift times. This process is known as "adaptive learning" or "shift adapts" and is similar to the closed […]

TRANSMISSION COMPONENT AND SYSTEM DESCRIPTION

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The mechanical components of the 4L60-E are as follows: • A torque converter with an electronically controlled capacity clutch (ECCC) This transmission is equipped with an ECCC. The pressure plate does not fully lock to the torque converter cover. Instead, the pressure plate maintains a small amount of slippage, about 20 RPM, in SECOND, THIRD […]

DEFINITIONS AND ABBREVIATIONS

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Throttle Positions Engine Braking A condition where the engine friction is used to slow the vehicle by manually downshifting during a zero throttle coastdown. Full Throttle Detent Downshift A quick apply of the accelerator pedal to its full travel, forcing a downshift. Heavy Throttle Approximately 3/4 of accelerator pedal travel (75 percent throttle position). Light […]

TRANSMISSION GENERAL INFORMATION How to Use This Section

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This section provides the following information: • General diagnosis information on transmissions • Procedures for diagnosing the Hydra-matic transmission When you diagnose any condition of the Hydra-matic transmission, begin with A Diagnostic Starting Point. This procedure indicates the proper path of diagnosing the transmission by describing the basic checks. This procedure will then refer you […]

HOLDING FIXTURE REMOVAL Tools Required

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J 8763-B Holding Fixture and Base. See Special Tools. Fig. 473: View Of J 8763-B Courtesy of GENERAL MOTORS CORP. Removal Procedure Remove the transmission from the J 8763-B. See Special Tools. DESCRIPTION AND OPERATION

TORQUE CONVERTER INSTALLATION Tools Required

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J 21366 Converter Holding Strap Installation Procedure CAUTION: The torque converter weighs approximately 65 lbs. Personal injury may result if you lift the torque converter improperly. Fig. 472: View Of J 21366 Installed On Torque Converter Courtesy of GENERAL MOTORS CORP. 1. Install the torque converter. 2. Install the J 21366 .

TORQUE CONVERTER END PLAY INSPECTION Tools Required

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• J 8001 Dial Indicator Set • J 26900-13 Magnetic Indicator Base • J 35138 Converter End Play Checker. See Special Tools. • J 39195 Converter End Play Check Tool. See Special Tools. Inspection procedure Fig. 471: Identifying J 35138, J 26900-13 & J 8001 Courtesy of GENERAL MOTORS CORP. 1. Inspect the torque converter […]

TRANSMISSION FLUID PAN INSTALLATION

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Fig. 460: View Of Transmission Oil Pan & Gasket Courtesy of GENERAL MOTORS CORP. 1. Place the transmission oil pan gasket (73) on the case. 2. Place the transmission oil pan (75) on the case. NOTE: Refer to FASTENER NOTICE. 3. Install all of the transmission oil pan screws (76). Tighten: Tighten the screws to […]