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

4L60-E; 4L65-E; 4L70-E

1. Holding Fixture Installation
2. Torque Converter Assembly Removal
3. Drain Oil
4. Converter Housing Removal
5. 2-4 Band Servo 2nd Apply Piston Assembly Removal
6. 2-4 Band Servo Piston Pin Length Check
7. Vehicle Speed Sensor and Case Extension Removal
8. Transmission Fluid Pan and Filter Assembly Removal
9. Control Valve Body and Wiring Harness Removal
10. Turbine Shaft Seal Removal
11. Transmission End Play Check
12. Oil Pump Removal
13. 2-4 Band, 3-4 Clutch Housing, and Reverse Input Clutch Housing Assembly Removal
14. Reaction Sun Gear Shell, Reaction Carrier Shaft, Input Internal Gear, and Input Carrier Assembly Removal
15. Low and Reverse Clutch Plate, Reaction Carrier, and Output Shaft Removal
16. Manual Shift Detent Lever with Shaft Position Switch Assembly and Park Pawl Actuator Removal
17. Low and Reverse Clutch Piston Removal
18. Case Assembly Inspection
19. 3rd Accumulator Retainer with Ball Assembly Leak Check
20. 3rd Accumulator Retainer with Ball Replacement
21. Case Bushing
22. Manual Shift Shaft Seal Installation
23. Low and Reverse Clutch Piston Installation
24. Manual Shift Detent Lever with Shaft Position Switch Assembly and Park Pawl Actuator Installation
25. Reaction Gear and Carrier Inspection
26. Reaction Gear and Carrier Installation
27. Low and Reverse Clutch Spacer Plate Selection
28. Low and Reverse Clutch Plate Installation
29. Low and Reverse Clutch Support Disassemble
30. Low and Reverse Clutch Support Installation
31. Reaction Sun Gear Installation
32. Reaction Carrier Shaft Replacement
33. Reaction Sun Gear Shell, Reaction Carrier Shaft, and Input Internal Gear Assembly Installation
34. Internal Transmission Speed Sensor Rotor Replacement
35. Output Shaft Installation
36. Input Carrier Inspection
37. Input Sun Gear Bushing Replacement
38. Input Carrier Inspection and Installation
39. Input Clutch Assembly Disassemble
40. 3-4 Clutch Housing with Input Shaft Inspection
41. 3-4 Clutch Housing with Input Shaft Assemble
42. Input Housing to Output Shaft Seal Installation
43. Overrun Clutch Installation
44. Forward Clutch Sprag Disassemble
45. Forward Clutch Sprag Assemble
46. Forward Clutch Assembly Assemble
47. Forward Clutch Piston Travel Check
48. 3-4 Clutch Plate Assemble
49. 3-4 Clutch Plate Travel Check
50. Clutch Air Check
51. Input Shaft Fluid Seal Ring Installation
52. Reverse Input Clutch Disassemble
53. Reverse Input Clutch Housing Front and Rear Bushing Replacement
54. Reverse Input Clutch Assemble
55. Reverse Input Clutch Plate Travel Check
56. Reverse Input and 3-4 Clutch Housing Installation
57. 2-4 Band Installation
58. Input Speed Sensor Removal
59. Oil Pump Disassemble
60. Transmission Fluid Pump Body Disassemble
61. Fluid Pump Rotor and Slide Measurement
62. Oil Pump Body Bushing Replacement
63. Oil Pump Body Assemble
64. Oil Pump Cover Disassemble
65. Input Shaft Front and Rear Bushing Replacement
66. Oil Pump Cover Assemble
67. Oil Pump Cover and Body Assemble
68. Input Speed Sensor Installation
69. Oil Pump Assembly Installation
70. Transmission End Play Check
71. Torque Converter Housing Installation
72. Turbine Shaft Seal Installation
73. Control Valve Body Disassemble
74. Control Valve Body Assemble
75. 3-4 Accumulator Installation
76. 1-2 Accumulator Disassemble
77. 1-2 Accumulator Assemble
78. 1-2 Accumulator Installation
79. Control Valve Body Installation
80. Manual Detent Spring Installation
81. Oil Filter Assembly Installation
82. Transmission Fluid Pan Installation
83. 2-4 Band Servo 2nd Apply Piston Assembly Disassemble
84. 2-4 Band Servo Piston Pin Length Check
85. 2-4 Band Servo 2nd Apply Piston Assembly Installation
86. Propeller Shaft Front Slip Yoke Bushing Replacement
87. Vehicle Speed Sensor and Case Extension Installation
88. Torque Converter End Play Inspection
89. Torque Converter Installation
90. Holding Fixture Removal