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

6T30/6T40/6T45/6T50 (MH7, MHJ, MHK)

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