Automatic Transaxle: Overhaul Infiniti M45 II

METHOD FOR WRITING DATA FROM THE ROM ASSEMBLY IN THE TRANSMISSION

In the following procedure, the TCM reads data from the ROM assembly and writes it to the EEPROM in the TCM.

1. With the EEPROM in the TCM erased.
2. Move selector lever in "P" position.
3. Turn ignition switch "ON" position.

Control Valve Assembly

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1. Disconnect the negative battery terminal.
2. Drain ATF through drain plug.
3. Disconnect heated oxygen sensor 2 harness connector.
4. Remove oil pan and oil pan gasket.
5. Disconnect terminal cord assembly connectors.
6. Disconnect fluid temperature sensor 2 connector.
7. Remove terminal cord assembly connectors from bracket.
8. Disconnect revolution sensor connector.
9. Straighten terminal clips to free terminal cord assembly and revolution sensor harness then remove terminal clips.
10. Remove bolts A, B and C from control valve assembly.
11. Remove control valve assembly from transmission case.
12. Remove fluid temperature sensor 2 with bracket from control valve assembly.
13. Remove bracket from fluid temperature sensor 2.

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1. Install fluid temperature sensor 2 in bracket.
2. Install fluid temperature sensor 2 in control valve assembly. (With bracket.) 7.9 N.m (0.81 kg-m, 70 in-lb)
3. Install control valve assembly. CAUTION: Hang down terminal cord assembly and revolution sensor harness toward outside so as not to disturb installation of control valve assembly. Make sure that turbine sensor securely installs turbine sensor hole. Assemble it so that manual valve cutout is engaged with manual plate projection. Install control valve assembly in transmission case. Install bolts A, B and C in control valve assembly. Tighten bolt 1, 2 and 3 temporarily to prevent dislocation. After that tighten them in order (1 --> 2 --> 3), and then tighten other bolts. 7.9 N.m (0.81 kg-m, 70 in-lb)
4. Install terminal cord assembly connectors in bracket.
5. Connect terminal cord assembly connectors.
6. Connect fluid temperature sensor 2 connector.
7. Connect revolution sensor connector.
8. Securely fasten terminal harness with clip.
9. Install oil pan on transmission case. CAUTION: Do not reuse oil pan gasket. Install it in the direction to align hole positions. Install oil pan gasket on oil pan. CAUTION: Install it so that drain plug comes to the position as shown in the figure. Be careful not to pinch harnesses. Install oil pan on transmission case. (With oil pan gasket) CAUTION: Do not reuse oil pan mounting bolts. Tighten oil pan mounting bolts to the specified torque in numerical order shown in the figure after temporarily tightening them. 7.9 N.m (0.81 kg-m, 70 in-lb)
10. Install drain plug on oil pan. 34 N.m (3.5 kg-m, 25 ft-lb)
11. Pour ATF into transmission assembly.
12. Connect heated oxygen sensor 2 harness connector.
13. Connect the negative battery terminal After completing installation, check fluid leakage and fluid level of transmission assembly. Refer to " «CHECKING A/T FLUID»(ref-181179-S06699314042005080100000) ".

Disassembly

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1. Drain ATF through drain hole.
2. Remove torque converter by holding it firmly and turning while pulling straight out.
3. Check torque converter one-way clutch using check tool as shown in the figure. Insert check tool into the groove of bearing support built into one-way clutch outer race. When fixing bearing support with check tool, rotate one-way clutch spline using screwdriver. Check that inner race rotates clockwise only. If not, replace torque converter assembly.
4. Remove converter housing from transmission case.
5. Remove O-ring from input clutch assembly.
6. Remove tightening bolts for oil pump assembly and transmission case.
7. Attach sliding hammer to oil pump assembly and extract it evenly from transmission case.
8. Remove O-ring from oil pump assembly.
9. Remove bearing race, needle bearing and front sun gear from transmission case. NOTE: Remove front sun gear by rotating left/right.
10. Remove seal rings from input clutch assembly.
11. Remove front carrier assembly from transmission case. (With input clutch assembly and rear internal gear.)
12. Loosen lock nut and remove band servo anchor end pin from transmission case.
13. Remove brake band from transmission case. To prevent brake linings from cracking or peeling, do not stretch the flexible band unnecessarily. When removing the brake band, always secure it with a clip as shown in the figure. Leave the clip in position after removing the brake band. Check brake band facing for damage, cracks, wear or burns.
14. Remove mid carrier assembly and rear carrier assembly as a unit.
15. Remove mid carrier assembly from rear carrier assembly.
16. Remove needle bearing (front side) from mid carrier assembly.
17. Remove needle bearing (rear side) from mid carrier assembly.
18. Remove needle bearing from rear carrier assembly.
19. Remove bearing race from rear carrier assembly.
20. Remove mid sun gear assembly, rear sun gear assembly and high and low reverse clutch hub as a unit.
21. Remove high and low reverse clutch assembly from transmission case.
22. Remove direct clutch assembly from transmission case.
23. Remove needle bearing from drum support edge surface.
24. Remove oil pan and oil pan gasket.
25. Check foreign materials in oil pan to help determine causes of malfunction. If the fluid is very dark, smells burned, or contains foreign particles, the frictional material (clutches, band) may need replacement. A tacky film that will not wipe clean indicates varnish build up. Varnish can cause valves, servo, and clutches to stick and can inhibit pump pressure. If frictional material is detected, replace radiator after repair of A/T. Refer to "RADIATOR ", "RADIATOR (ALUMINUM TYPE) ".
26. Disconnect terminal cord assembly connectors.
27. Disconnect fluid temperature sensor 2 connector.
28. Remove terminal cord assembly connectors from bracket.
29. Disconnect revolution sensor connector.
30. Straighten terminal clips to free terminal cord assembly and revolution sensor harness then remove terminal clips.
31. Remove bolts A, B and C from control valve assembly.
32. Remove control valve assembly from transmission case.
33. Remove fluid temperature sensor 2 with bracket from control valve assembly.
34. Remove bracket from fluid temperature sensor 2.
35. Remove tightening bolts for output shaft & companion flange complement and transmission case.
36. Tap output shaft & companion flange complement with soft hammer.
37. Remove output shaft & companion flange complement from transmission case. (With needle bearing)
38. Remove intermediate shaft from transmission case by rotating left/right.
39. Remove needle bearing from transmission case.
40. Remove revolution sensor from transmission case.
41. Remove reverse brake snap ring (fixing plate) using 2 flatbladed screwdrivers. NOTE: Press out snap ring from the transmission case oil pan side gap using a flat-bladed screwdriver, and remove it using another screwdriver.
42. Remove reverse brake retaining plate, drive plate, driven plate and dish plate from transmission case.
43. Remove snap ring (fixing spring retainer) using a flat-bladed screwdriver.
44. Remove spring retainer and return spring from transmission case.
45. Remove seal rings from drum support.
46. Remove reverse brake piston from transmission case.
47. Remove lip seal and D-ring from reverse brake piston.
48. Remove terminal cord assembly connectors from bracket.
49. Remove terminal cord assembly from transmission case.
50. Use a pin punch (4mm dia. commercial service tool) to knock out retaining pin.
51. Remove manual shaft retaining pin with nippers.
52. Remove manual plate (with parking rod) from manual shaft.
53. Remove parking rod from manual plate.
54. Remove manual shaft from transmission case.
55. Remove manual shaft oil seal using a flat-bladed screwdriver.
56. Remove detent spring and spacer from transmission case.
57. Remove snap ring from transmission case using snap ring pliers.
58. Remove servo assembly from transmission case.
59. Remove return spring from servo assembly.
60. Remove O-rings from servo assembly.
61. Remove parking actuator support from output shaft & companion flange complement.
62. Remove parking pawl, parking pawl shaft and return spring from output shaft & companion flange complement.
63. Remove return spring from parking pawl.

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1. Remove oil pump housing from oil pump cover.
2. Remove oil pump housing oil seal using a flat-bladed screwdriver.
3. Remove O-ring from oil pump housing.
4. Remove O-ring from oil pump cover.

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1. Install O-ring in oil pump cover.
2. Install O-ring in oil pump housing.
3. Install oil seal in oil pump housing.
4. Install oil pump housing in oil pump cover. 9.0 N.m (0.92 kg-m, 80 in-lb.)

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1. Using a flat-bladed screwdriver, remove snap ring from front sun gear.
2. Remove 3rd one-way clutch from front sun gear.

Assembly (2)

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1. Install O-ring in oil pump assembly.
2. Install bearing race in oil pump assembly.
3. Install oil pump assembly in transmission case.
4. Apply recommended sealant (Genuine RTV silicone sealant or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".) to oil pump assembly as shown in illustration.
5. Tighten oil pump mounting bolts to specified torque.
6. Install O-ring in input shaft.
7. Install converter housing in transmission case. Converter housing mounting bolt: 52 N.m (5.3 kg-m, 38 ft-lb) Self-sealing bolt: 61 N.m (6.2 kg-m, 45 ft-lb)
8. Make sure that brake band does not close turbine revolution sensor hole.
9. Install fluid temperature sensor 2 in bracket.
10. Install fluid temperature sensor 2 in control valve assembly. (With bracket.)
11. Install control valve assembly. CAUTION: Hang down terminal cord assembly and revolution sensor harness toward outside so as not to disturb installation of control valve assembly. Make sure that turbine sensor securely installs turbine sensor hole. Assemble it so that manual valve cutout is engaged with manual plate projection. Install control valve assembly in transmission case. Install bolts A, B and C in control valve assembly. Tighten bolt 1, 2 and 3 temporarily to prevent dislocation. After that tighten them in order (1 --> 2 --> 3), and then tighten other bolts. 7.9 N.m (0.81 kg-m, 70 in-lb)
12. Install terminal cord assembly connectors in bracket.
13. Connect terminal cord assembly connectors.
14. Connect fluid temperature sensor 2 connector.
15. Connect revolution sensor connector.
16. Securely fasten terminal harness with clip.
17. Install oil pan on transmission case. CAUTION: Do not reuse oil pan gasket. Install it in the direction to align hole positions. Install oil pan gasket on transmission case. CAUTION: Install it so that drain plug comes to the position as shown in the figure. Be careful not to pinch harnesses. Install oil pan on transmission case. CAUTION: Do not reuse oil pan mounting bolts. Tighten oil pan mounting bolts to the specified torque in numerical order shown in the figure after temporarily tightening them.
18. Install drain plug in oil pan.
19. Install torque converter. Pour ATF into torque converter. Approximately 2 liter (2-1/8 US qt, 1-3/4 Imp qt) of fluid is required for a new torque converter. When reusing old torque converter, add the same amount of fluid as was drained. Install torque converter while aligning notches of torque converter with notches of oil pump. Measure distance "A" to check that torque converter is in proper position. Distance "A": 22.0 mm (0.87 in) or more