ATSG - GM - TechTran THM - 440-T4 - 4T60 Revised Edition And (440-T4) Update Revised Edition Volume 1 Set

Book 1

THM 440-T4 “UPDATE HANDBOOK” VOL.1 – ATSG (Automatic Transmission Service Group) PDF. Since the introduction of the THM 440-T4 Transaxle in April, 1984, there have been many major engineering design changes. These changes have affected nearly every part used in the THM 440-T4. This Update Handbook will explain each change, the parts affected by the change, and any parts interchangeability problems created by the change.

The engineering changes covered by this “Update Handbook” are:

1. Rotors, Vanes, and Slides
2. Pump Body Changes
3. Valve Body Changes
4. Valve Body Gasket Changes
5. Channel Plate Changes
6. Accumulator Pin Changes
7. Fourth Clutch Changes
8. Second Clutch Changes
9. Driven Sprocket Support Changes
10. Third Roller Clutch Changes
11. Plastic Lube Dam (Update)
12. Input Sprag Changes
13. Third Clutch Changes
14. Modulator Changes
15. Transaxle Case Changes
16. Governor Cover Changes

CONTENTS

• Rotors, Vanes, and Slides
• Pump Body Changes
• Valve Body Changes
• Channel Plate Changes
• Accumulator Pin Changes
• Fourth Clutch Changes
• Second Clutch Changes
• Driven Sprocket Support Changes
• Third Roller Clutch Changes
• Plastic Lube Dam (Update)
• Input Sprag Changes
• Third Clutch Changes
• Modulator Changes
• Transaxle Case Changes
• Governor Cover Changes
• 85-85 Identification
• 1986 Identification
• 1987 Identification
• 1988 Identification
• 1989 Identification
• TCC Screen and Orifice Location
• Valve Body Gasket Identification
• Oil Filter Changes
• 1988 Changes (Begin)
• 1989 Changes (Begin)
• 3rd Roller and Input Sprag Failure

Language: English

Format: PDF

Pages: 102

Book 2

THM 4T40-E – ATSG (Automatic Transmission Service Group) PDF. 

This Manual contains general description and the procedures necessary to repair, service, or overhaul the THM 4T40-E electronic overdrive automatic transaxle. This unit was first introduced in the 1995 Chevrolet Cavalier and Pontiac Sunfire vehicles, and will eventually replace the THM 125C (3T40).

The THM 4T40-E is a fully automatic front wheel drive transaxle. It provides park, reverse, neutral, and 4 forward speeds including overdrive. The shift pattern is controlled electronically with 2 shift solenoids that recieve a ground signal from the Powertrain Control Module (PCM). The PCM will vary shift points, as it is constantly interpreting numerous electronic signals from various operational sensore located on the vehicle.

The PCM also controls apply and release of the Torque Converter Clutch. Line pressure and shift feel are also controlled electronically with a Pressure Control Solenoid (PCS) located on the valve body and is dependant on TPS and VSS signals.

CONTENTS

• RANGE REFERENCE CHART
• FLUID CHECKING PROCEDURE
• LINE PRESSURE TEST
• TROUBLE CODE RETRIEVAL AND PCM LOCATION
• TROUBLE CODE CHART AND DESCRIPTION
• ELECTRONIC COMPONENTS AND DESCRIPTION
• INTERNAL WIRE HARNESS SCHEMATIC
• ELECTRONIC COMPONENT RESISTANCE CHART
• DIAGNOSTIC CHARTS
• TCC SHUDDER DIAGNOSIS
• OIL PASSAGE IDENTIFICATION
• CHECKBALL LOCATIONS IN CHANNEL PLATE
• TRANSAXLE DISASSEMBLY
• COMPONENT REPAIR AND TRANSAXLE ASSEMBLY
• FORWARD CLUTCH HOUSING ASSEMBLY
• DIRECT/COAST CLUTCH HOUSING ASSEMBLY
• SELECTIVE THRUST WASHER MEASUREMENT
• REVERSE INPUT CLUTCH AND 2ND ROLLER CLUTCH
• INPUT SPEED SENSOR ASSEMBLY
• VALVE BODY ASSEMBLY
• PRESSURE SWITCH ASSEMBLY TEST PROCEDURE (OFF UNIT)
• BEARING AND WASHER LOCATION CHART
• TORQUE SPECIFICATIONS
• SPECIAL TOOLS
• “UPDATE SECTION”

Language: English

Format: PDF

Pages: 128