Automatic Transmission: Overhaul Nissan Armada I рестайлинг

Disassembly

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1. Drain A/T fluid through drain plug.
2. Remove torque converter by holding it firmly and turning while pulling straight out.
3. Check torque converter one-way clutch using a check tool as shown in the figure. Insert a check tool into the groove of bearing support built into one-way clutch outer race. While holding bearing support with a check tool, rotate one-way clutch spline using suitable tool. Make sure that inner race rotates clockwise only. If not, replace torque converter assembly.
4. Remove bolts (<--) and converter housing from transmission case. CAUTION: Do not scratch converter housing.
5. Remove O-ring from input clutch assembly.
6. Remove oil pump assembly to transmission case bolts.
7. Remove the oil pump assembly evenly from the transmission case using Tools. Tool number : ST25850000 (J-25721-A) CAUTION: Fully tighten the sliding hammer screws. Make sure that bearing race is installed to the oil pump assembly edge surface .
8. Remove O-ring from oil pump assembly.
9. Remove bearing race from oil pump assembly.
10. Remove needle bearing from front sun gear.
11. Remove front sun gear assembly from front carrier assembly. NOTE: Remove front sun gear by rotating it left and right.
12. Remove seal rings from input clutch assembly.
13. Remove front carrier assembly (with input clutch assembly and rear internal gear) from rear carrier assembly. CAUTION: Do not remove it with needle bearing.
14. Loosen lock nut and remove band servo anchor end pin from transmission case.
15. Remove brake band from transmission case. CAUTION: 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. Check brake band facing for damage, cracks, wear or burns.
16. Remove mid carrier assembly and rear carrier assembly as a unit.
17. Remove mid carrier assembly from rear carrier assembly.
18. Remove needle bearing (front side) from mid carrier assembly.
19. Remove needle bearing (rear side) from mid carrier assembly.
20. Remove bearing race from rear carrier assembly.
21. Remove needle bearing from rear carrier assembly.
22. Remove mid sun gear assembly, rear sun gear assembly and high and low reverse clutch hub as a unit. CAUTION: Remove them with bearing race and needle bearing.
23. Remove high and low reverse clutch assembly from direct clutch assembly. CAUTION: Make sure that needle bearing is installed to the high and low reverse clutch assembly edge surface.
24. Remove needle bearing from drum support.
25. Remove direct clutch assembly from reverse brake.
26. Remove snap ring from A/T assembly harness connector.
27. Push A/T assembly harness connector. CAUTION: Do not damage connector.
28. Remove oil pan and oil pan gasket. Refer to " «OIL PAN»(ref-382157-S21258020702011011400000) ".
29. Check foreign materials in oil pan to help determine causes of malfunction. If the A/T 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, perform A/T fluid cooler cleaning. Refer to " «A/T FLUID COOLER CLEANING»(ref-382157-S38836394312011011400000) ".
30. Remove magnets from oil pan.
31. Disconnect output speed sensor connector (1). CAUTION: Do not damage connector.
32. Straighten terminal clip (<--) to free output speed sensor harness.
33. Remove bolts (A), (B) and (C) from control valve with TCM. <--:Front BOLTS REFERENCE CHART Bolt symbol Length mm (in) Number of bolts A 42 (1.65) 5 B 55 (2.17) 6 C 40 (1.57) 1
34. Remove control valve with TCM from transmission case. CAUTION: When removing, be careful with the manual valve notch and manual plate height. Remove it vertically.
35. Remove plug (1) with bracket (2) from control valve with TCM.
36. Remove bracket (1) from plug (2).
37. Remove O-ring (1) from plug (2).
38. Remove O-ring from A/T assembly harness connector.
39. Disconnect TCM connectors. CAUTION: Do not damage connectors.
40. Remove A/T assembly harness connector from control valve with TCM using suitable tool.
41. Disconnect TCM connector (1) and transmission range switch connector (2). CAUTION: Do not damage connectors.
42. Remove rear extension assembly (2WD models) or adapter case assembly (4WD models) according to the following procedures. 2WD models Remove tightening bolts (<--) for rear extension assembly and transmission case. Brackets (1) Self-sealing bolts (2) Tap rear extension assembly with soft hammer. Remove rear extension assembly (with needle bearing) from transmission case. 4WD models Remove tightening bolts (<--) for adapter case assembly and transmission case. Brackets (1) Self-sealing bolt (2) Tap adapter case assembly using suitable tool. Remove adapter case assembly (with needle bearing) from transmission case. Remove gasket from transmission case.
43. Remove bearing race from output shaft.
44. Remove output shaft from transmission case by rotating left and right.
45. Remove parking gear from output shaft.
46. Remove seal rings from output shaft.
47. Remove needle bearing from transmission case.
48. Remove output speed sensor (1) from transmission case. <--:Bolt CAUTION: Do not subject it to impact by dropping or hitting it. Do not disassemble. Do not allow metal filings or any foreign material to get on the sensor's front edge magnetic area. Do not place in an area affected by magnetism.
49. Remove reverse brake snap ring using two flat-bladed screwdrivers. NOTE: Press out snap ring from the transmission case oil pan side gap using a flat-bladed screwdriver, and remove it using a another screwdriver.
50. Remove reverse brake retaining plate from transmission case. Check facing for burns, cracks or damage. If necessary, replace the plate.
51. Remove N-spring from transmission case.
52. Remove reverse brake drive plates, driven plates and dish plate from transmission case. Check facing for burns, cracks or damage. If necessary, replace the plate.
53. Remove snap ring using suitable tool.
54. Remove spring retainer and return spring from transmission case.
55. Remove seal rings from drum support.
56. Remove needle bearing from drum support edge surface.
57. Remove reverse brake piston from transmission case using compressed air. Refer to " «OIL CHANNEL»(ref-382157-S07214868472011011400000) ". CAUTION: Care should be taken not to abruptly blow air. It makes the piston incline, and as a result, it becomes hard to disassemble the pistons.
58. Remove D-rings from reverse brake piston.
59. Knock out retaining pin using suitable tool.
60. Remove manual shaft retaining pin using suitable tool.
61. Remove manual plate (with parking rod) from manual shaft.
62. Remove parking rod from manual plate.
63. Remove manual shaft from transmission case.
64. Remove manual shaft oil seals using suitable tool. CAUTION: Do not scratch transmission case.
65. Remove detent spring and spacer from transmission case.
66. Remove snap ring from transmission case using suitable tool.
67. Remove servo assembly (with return spring) from transmission case.
68. Remove return spring from servo assembly.
69. Remove O-rings from servo assembly.
70. Remove needle bearing (1) from rear extension (2WD models) or adapter case (4WD models).
71. Remove parking actuator support from rear extension (2WD models) or adapter case (4WD models).
72. Remove parking pawl (with return spring) and pawl shaft from rear extension (2WD models) or adapter case (4WD models).
73. Remove return spring (1) from parking pawl (2).
74. Remove rear oil seal from rear extension (2WD models) or adapter case (4WD models) using suitable tool. CAUTION: Do not scratch rear extension (2WD models) or adapter case (4WD models).

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1. Remove oil pump housing from oil pump cover.
2. Remove oil pump housing oil seal using suitable tool. CAUTION: Be careful not to scratch oil pump housing.
3. Remove O-ring from oil pump housing.
4. Remove O-ring from oil pump cover.

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1. Install new O-ring to oil pump cover. CAUTION: Do not reuse O-ring. Apply ATF to O-ring.
2. Install new O-ring to oil pump housing. CAUTION: Do not reuse O-ring. Apply ATF to O-ring.
3. Install new oil pump housing oil seal to the oil pump housing until it is flush with the face of oil pump housing using Tool. CAUTION: Do not reuse oil seal. Apply ATF to oil seal. Tool number : ST33400001 (J-26082)
4. Install oil pump housing in oil pump cover. Tighten oil pump housing bolts to the specified torque. Refer to " «COMPONENT»(ref-382157-S42570610702011011400000) ".

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1. Remove snap ring from front sun gear using suitable tool.
2. Remove 3rd one-way clutch from front sun gear.

Front Carrier Assembly

1. Check for deformation, fatigue or damage. CAUTION: If necessary, replace the front carrier assembly.

1. Remove snap rings from direct clutch drum using suitable tool.
2. Remove drive plates, driven plates and retaining plate from direct clutch drum.

Assembly (2)

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1. Install O-ring to oil pump assembly. CAUTION: Do not reuse O-ring. Apply ATF to O-ring.
2. Install bearing race to oil pump assembly. CAUTION: Apply petroleum jelly to bearing race.
3. Install oil pump assembly in transmission case. CAUTION: Apply ATF to oil pump bearing.
4. Apply recommended sealant (Genuine RTV Silicone Sealant or equivalent. Refer to " «RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS»(ref-382152-S15373783892011011400000) ".) to oil pump assembly as shown in the figure. CAUTION: Completely remove all moisture, oil, old sealant and any foreign material from the oil pump bolts and oil pump bolt mating surfaces.
5. Tighten oil pump bolts to specified torque. Oil pump bolts : 48 N.m (4.9 kg-m, 35 ft-lb) CAUTION: Apply ATF to oil pump bushing.
6. Install O-ring to input clutch assembly. CAUTION: Do not reuse O-ring. Apply ATF to O-ring.
7. Install converter housing to transmission case and tighten bolts (<--) to specified torque. Converter housing bolt : 52 N.m (5.3 kg-m, 38 ft-lb) Self-sealing bolt (A) : 61 N.m (6.2 kg-m, 45 ft-lb) CAUTION: Do not reuse self-sealing bolt.
8. Make sure that brake band (1) does not close input speed sensor hole (A).
9. Connect TCM connector (1) and transmission range switch connector (2).
10. Install A/T assembly harness connector to control valve with TCM.
11. Connect TCM connectors.
12. Install O-ring to A/T assembly harness connector. CAUTION: Do not reuse O-ring. Apply ATF to O-ring.
13. Install new O-ring (1) in plug (2). CAUTION: Do not reuse O-ring. Apply ATF to O-ring. O-ring should be free of contamination.
14. Install plug (2) to bracket (1).
15. Install plug (1) [with bracket (2)] to control valve with TCM and tighten bolt ( <--) to specified torque. Bracket bolt : 7.9 N.m (0.81 kg-m, 70 in-lb) CAUTION: Adjust bolt hole of bracket to bolt hole of control valve.
16. Install control valve with TCM in transmission case. : Brake band CAUTION: Make sure that input speed sensor is securely installed into input speed sensor hole (A) . Hang down output speed sensor harness toward outside so as not to disturb installation of control valve with TCM. Adjust A/T assembly harness connector of control valve with TCM to terminal hole of transmission case. Assemble it so that manual valve cutout is engaged with manual plate projection.
17. Install bolts (A), (B) and (C) to control valve with TCM. <--:Front BOLTS REFERENCE CHART Bolt symbol Length mm (in) Number of bolts A 42 (1.65) 5 B 55 (2.17) 6 C 40 (1.57) 1
18. Tighten bolt (A), (B) and (C) temporarily to prevent dislocation. After that tighten them in order (A --> B --> C), and then tighten other bolts. <--:Front BOLTS REFERENCE CHART Bolt symbol A B C Number of bolts 5 6 1 Length mm (in) 42 (1.65) 55 (2.17) 40 (1.57) Tightening torque N.m (km-g, in-lb) 7.9 (0.81, 70) With ATF applied 7.9 (0.81, 70)
19. Connect output speed sensor connector (1).
20. Securely fasten output speed sensor harness with terminal clip (<--)
21. Pull down A/T assembly harness connector. CAUTION: Do not damage connector.
22. Install snap ring to A/T assembly harness connector.
23. Install magnets in oil pan.
24. Install oil pan to transmission case. Refer to". «OIL PAN»(ref-382157-S21258020702011011400000)
25. Install torque converter. Pour ATF into torque converter. NOTE: Approximately 2 liters (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. CAUTION: Install torque converter while rotating it. Measure distance "A" to make sure that torque converter is in proper position. Distance "A" : 24.0 mm (0.94 in)