GM THM 440-T4 / 4T60 Transaxle Automatic Transmission ATSG Rebuild Manual

• GM THM 4T60 (440-T4) Transaxle found in many 1984 to 1993 GM domestic vehicles.
• Covers assembly, dis-assembly, diagnosis, and troubleshooting.

Note: There have been many engineering changes in this transmission since its introduction. ATSG also publishes an "Update Handbook Volume I" (83-440TTM-U1) and an "Update Handbook Volume II" (83-440TTM-U2) which include the many changes and are required along with this manual for a proper overhaul or repair.

Contents:

• Road Test Procedure
• Ranger Reference Chart
• Oil Pressure Test
• Updated Wiring Schematics
• Component Oil Passage Identification (1985 Hydraulics)
• Channel Plate & Valve Body Checkball Locations
• Transaxle Disassembly
• Transaxle Inspection & Assembly
• Sprag Rotation
• Final Drive End Play Measurement
• Valve Body Valve Identification
• Channel Plate & Valve Body Checkball Locations (85 1/2 Hydraulics)
• Torque Specifications
• Thrust Washer & Bearing Locations
• Special Tools
• 1985 Versus 1985 1/2 Model Identification
• Harsh Drive Engagement Complaint
• Body Code Identification