Overhaul Procedure Steps

NOTE: This article lists the sequential steps necessary to overhaul the transmission.
^ For the specific step listed below, refer to that step under "Repair Instructions". Repair Instructions

6T40/45/50

1. Lift Plate and Holding Fixture Installation
2. Torque Converter Removal
3. Control Valve Body Assembly Removal
4. Input and Output Speed Sensor Removal
5. Torque Converter Housing with Fluid Pump Assembly Removal (Non Hybrid)
6. Differential Carrier Removal (6T40/45/50)
7. Drive and Driven Sprocket, Drive Link, and Park Pawl Removal (6T40/45/50)
8. Internal Components Removal
9. 2-6 Clutch Piston Removal
10. Manual Shift Detent Lever with Shaft Position Switch Assembly and Park Pawl Actuator Removal
11. Manual Shift Shaft Seal Removal
12. Input Shaft Support Replacement (Gen 2)
13. 3-5-Reverse and 4-5-6 Clutch Fluid Seal Ring Replacement (Gen 2)
14. Front Wheel Drive Shaft Seal Replacement - Case Side
15. Transmission Case Cleaning and Inspection
16. Manual Shift Detent Lever with Shaft Position Switch Assembly and Park Pawl Actuator Installation
17. Manual Shift Shaft Seal Installation
18. 2-6 Clutch Piston Installation (6T40/45/50)
19. Low and Reverse and 1-2-3-4 Clutch Housing, Low and Reverse Clutch Assembly, Output Sun Gear, and 2-6 Clutch Plate Disassemble (Gen 2)
20. Input, Reaction, and Output Carrier Disassemble
21. 3-5-Reverse and 4-5-6 Clutch Housing Disassemble (6T40/45/50 - Gen 2)
22. 3-5-Reverse and 4-5-6 Clutch Housing Assemble (6T40/45/50 - Gen 2)
23. Input, Reaction, and Output Carrier Assemble (Gen 2)
24. 3-5-Reverse and 4-5-6 Clutch Housing, and Input, Reaction, and Output Carrier Installation
25. Low and Reverse Clutch Assembly and Low and Reverse Clutch Plate Installation
26. Low and Reverse and 1-2-3-4 Clutch Housing Disassemble
27. Low and Reverse and 1-2-3-4 Clutch Housing Cleaning and Inspection
28. Low and Reverse and 1-2-3-4 Clutch Housing Assemble (6T40/45/50)
29. Low and Reverse and 1-2-3-4 Clutch Housing, and 1-2-3-4 Clutch Plate Installation (6T40/45/50)
30. Drive Sprocket, Driven Sprocket, and Drive Link Cleaning and Inspection
31. Drive and Driven Sprocket, Drive Link, and Park Pawl Installation (6T40/45/50)
32. Front Differential Carrier Cleaning and Inspection
33. Front Differential Carrier Installation (6T40/45/50)
34. Transmission Fluid Pump, Front Differential Carrier Baffle, and Front Differential Ring Gear Removal (6T40/45)
35. Front Wheel Drive Shaft Seal Replacement - Torque Converter Housing Side
36. Torque Converter Housing Cleaning and Inspection
37. Transmission Fluid Pump Disassemble (6T40/45/50)
38. Fluid Pump Selective Measurement
39. Transmission Fluid Pump Assemble (6T40/45/50)
40. Transmission Fluid Pump, Front Differential Carrier Baffle, and Front Differential Ring Gear Installation (6T40/45)
41. Torque Converter Housing with Fluid Pump Assembly Installation (6T40/6T45/6T50 Non Hybrid)
42. Input and Output Speed Sensor Installation
43. Control Valve Body Assembly Disassemble (Gen 2)
44. Control Valve Body Cleaning and Inspection (Gen 2)
45. Control Valve Channel Plate Cleaning and Inspection (6T40/45/50 - Gen 2)
46. Control Valve Body Assembly Assemble (Gen 2)
47. Control Valve Body Assembly Installation
48. Control Solenoid Valve and Transmission Control Module Assembly Installation
49. Control Valve Body Cover Installation
50. Torque Converter Fluid Seal Replacement
51. Torque Converter Installation
52. Lift Plate and Holding Fixture Removal