Disassembly

A750F AUTOMATIC TRANSMISSION UNIT: DISASSEMBLY

DISASSEMBLY

1. REMOVE TRANSMISSION CONTROL SHAFT LEVER LH

(a) Remove the nut, washer and control shaft lever LH.
2. REMOVE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Using a screwdriver, pry out the lock washer.
(b) Remove the nut, lock washer and bolt.
(c) Remove the park/neutral position switch.
3. REMOVE OIL COOLER TUBE UNION

(a) Remove the 2 oil cooler tube unions.
(b) Remove the O-ring from the oil cooler tube union.
4. REMOVE SPEED SENSOR

(a) Remove the 2 bolts and 2 speed sensor.
(b) Remove the O-ring from each sensor.
5. REMOVE AUTOMATIC TRANSAXLE BREATHER TUBE

(a) Remove the 2bolts.
(b) Remove the breather tube.
(c) Remove the O-ring from each tube.
6. REMOVE AUTOMATIC TRANSMISSION HOUSING

(a) Remove the 10 bolts.
(b) Remove the transmission housing.
7. REMOVE TRANSMISSION CASE ADAPTER SUB-ASSEMBLY
(a) Remove the 8 bolts.
(b) Remove the transmission case adapter assembly.
HINT: Use a brass bar and a hammer to remove the extension housing assembly.

(a) Using a screwdriver, pry out the oil seal.
9. FIX AUTOMATIC TRANSMISSION CASE SUB-ASSEMBLY

(a) Install the transmission case on the overhaul attachment.
10. REMOVE AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY
NOTE: Do not turn the transmission over as this will contaminate the valve body with foreign matter on the bottom of the pan.

(a) Remove the drain plug and 20 bolts.
11. INSPECT AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY Transmission Unit

12. REMOVE VALVE BODY OIL STRAINER ASSEMBLY

(a) Turn over the transmission.
(b) Remove the 4 bolts holding the valve body oil strainer assembly to the valve body.
(c) Remove the O-ring form the valve body oil strainer assembly.
13. REMOVE TRANSMISSION WIRE

(a) Remove the ATF temperature sensor.
(b) Remove the bolt and clamp.
(c) Disconnect the 7 connectors from the shift solenoid valves.

(d) Remove the bolt from the case.
(e) Pull the transmission wire out of the transmission case.
(f) Remove the O-ring from the transmission wire.
14. REMOVE TRANSMISSION VALVE BODY ASSEMBLY

(a) Remove the 19 bolts.
(b) Remove the valve body assembly.
15. REMOVE TRANSAXLE CASE GASKET

(a) Remove the 3 transaxle case gaskets.
16. REMOVE BRAKE DRUM GASKET

(a) Remove the 3 brake drum gaskets.
17. REMOVE CHECK BALL BODY

(a) Remove the check ball body and spring.
18. REMOVE C-2 ACCUMULATOR PISTON

(a) Applying compressed air to the oil hole, and remove the C2 accumulator piston and spring.
(b) Remove the 2 O-rings from the piston.
NOTE: Be careful as the C-3 and B-3 accumulator piston may jump out.

19. REMOVE B-3 ACCUMULATOR PISTON

(a) Applying compressed air to the oil hole, and remove the B3 accumulator piston and spring.
(b) Remove the 2 O-rings from the piston.
NOTE: Be careful as the C-3 accumulator piston may jump out.

20. REMOVE C-3 ACCUMULATOR PISTON

(a) Applying compressed air to the oil hole, and remove the C3 accumulator piston and 2 spring.
(b) Remove the 2 O-rings from the piston.
21. REMOVE C-1 ACCUMULATOR VALVE

(a) Remove the C-1 accumulator valve and 2 springs.
22. REMOVE PARKING LOCK PAWL BRACKET

(a) Remove the 3 bolts and parking lock pawl bracket.
23. REMOVE PARKING LOCK ROD SUB-ASSEMBLY

(a) Disconnect the parking lock rod from the manual valve lever.
24. REMOVE PARKING LOCK PAWL SHAFT

(a) Pull out the parking lock pawl shaft from the front side, and then remove the lock pawl and spring.
(b) Remove the E-ring from the shaft.
25. REMOVE MANUAL VALVE LEVER SUB-ASSEMBLY

(a) Using a hammer and screwdriver, cut off the spacer and remove it from the shaft.

(b) Using a pin punch and hammer, tap out the spring pin.
HINT: Slowly drive out the spring pin so that it does not fall into the transmission case.

(c) Pull the manual valve lever shaft out through the case, and remove the manual valve lever.
26. REMOVE MANUAL VALVE LEVER SHAFT OIL SEAL

(a) Using a screwdriver, remove the 2 oil seals.
27. REMOVE OIL PUMP ASSEMBLY

(a) Remove the 10 bolts holding the oil pump from the transmission case.

(b) Using SST, remove the oil pump.
SST: 09350-30020
09350-07020

(a) Remove the clutch drum and input shaft drum assembly from the transmission case.

(b) Remove the clutch drum thrust washer and thrust needle roller bearing.
29. INSPECT NO. 2 ONE-WAY CLUTCH ASSEMBLY Transmission Unit

30. REMOVE NO. 2 ONE-WAY CLUTCH ASSEMBLY

(a) Remove the No. 2 one-way clutch assembly and No. 2 clutch drum thrust washer from the clutch drum and input shaft assembly.
31. REMOVE NO. 3 BRAKE SNAP RING

(a) Using a screwdriver, remove the No. 3 brake snap ring from the case.
32. REMOVE NO. 3 BRAKE DISC

(a) Remove the flange and cushion plate the 4 discs and the 4 plates from the case.
33. INSPECT NO. 3 BRAKE DISC Transmission Unit

34. REMOVE 2ND BRAKE PISTON HOLE SNAP RING

(a) Using SST, remove the snap ring.
SST: 09350-30020
09350-07060
35. REMOVE ONE-WAY CLUTCH ASSEMBLY

(a) Remove the one-way clutch assembly and the No. 1 planetary carrier thrust washer from the case.
36. REMOVE 2ND BRAKE CYLINDER

(a) Remove the 2nd brake cylinder from the case.
37. REMOVE 2ND BRAKE PISTON

(a) Using SST and a press, remove the snap ring.
SST: 09351-40010

(b) Hold the 2nd brake piston and apply compressed air (392 kPa, 4.0 kgf/cm2, 57 psi) to the 2nd brake cylinder to remove the 2nd brake piston.

(c) Remove the 2 O-rings from the 2nd brake piston.
38. INSPECT NO. 3 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY Transmission Unit

39. REMOVE FRONT PLANETARY GEAR ASSEMBLY

(a) Remove the front planetary gear assembly and the one-way clutch inner race from the case.

(b) Remove the thrust needle roller bearing, the No. 3 thrust bearing race and the No. 2 planetary carrier thrust washer from the front planetary gear assembly.
40. INSPECT FRONT PLANETARY GEAR ASSEMBLY Transmission Unit

41. INSPECT ONE-WAY CLUTCH ASSEMBLY Transmission Unit

42. REMOVE FRONT PLANETARY RING GEAR

(a) Remove the front planetary ring gear and bearing from the transmission case.
43. REMOVE CENTER PLANETARY RING GEAR

(a) Using a screwdriver, remove the snap ring.

(b) Remove the center planetary ring gear and front planetary ring gear flange from the front planetary ring gear.
44. REMOVE NO. 1 BRAKE DISC

(a) Remove the flange, 3 discs and 3 plates from the case.
45. INSPECT NO. 1 BRAKE DISC Transmission Unit

46. REMOVE BRAKE PISTON RETURN SPRING SNAP RING

(a) Using a screwdriver, remove the brake piston return spring snap ring from the case.
47. REMOVE BRAKE PISTON RETURN SPRING SUB-ASSEMBLY

(a) Remove the brake piston return spring and No. 1 the brake piston with the No. 1 brake cylinder from the transmission case.
48. INSPECT BRAKE PISTON RETURN SPRING SUB-ASSEMBLY Transmission Unit

49. REMOVE NO. 1 BRAKE PISTON

(a) Hold the No. 1 brake piston and apply compressed air (392 kPa, 4 kgf/cm2, 57 psi) to the transmission case to remove the No. 1 brake piston.
HINT: If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers.

(b) Remove the 2 O-rings from the No. 1 brake piston.
50. REMOVE NO. 2 BRAKE DISC

(a) Using a screwdriver, remove the snap ring from the case.

(b) Remove the flange, the brake piston return spring, the 3 discs and the 3 plates from the case.
51. INSPECT NO. 2 BRAKE DISC Transmission Unit

52. INSPECT NO. 2 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY Transmission Unit

53. REMOVE NO. 2 BRAKE PISTON

(a) Hold the No. 2 brake piston and apply compressed air (392 kPa, 4 kgf/cm2, 57 psi) to the transmission case to remove the No. 2 brake piston.
HINT: If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers.

(b) Remove the 2 O-rings from the No. 2 brake piston.
54. REMOVE CENTER PLANETARY GEAR ASSEMBLY

(a) Remove the center planetary gear assembly, the planetary sun gear and the No. 4 thrust bearing race from the case.
55. INSPECT CENTER PLANETARY GEAR ASSEMBLY Transmission Unit

56. REMOVE INTERMEDIATE SHAFT

(a) Using a screwdriver, remove the snap ring from the case.

(b) Remove the intermediate shaft with the No. 3 one-way clutch assembly from the case.
57. INSPECT NO. 3 ONE-WAY CLUTCH ASSEMBLY Transmission Unit

58. REMOVE NO. 3 ONE-WAY CLUTCH ASSEMBLY

(a) Remove the No. 3 one-way clutch assembly and the one-way clutch inner race from the intermediate shaft.
59. REMOVE REAR PLANETARY RING GEAR FLANGE SUB-ASSEMBLY

(a) Remove the No. 8 thrust bearing race, thrust needle roller bearing, the No. 7 thrust bearing race and the planetary ring gear flange from the intermediate shaft.
60. INSPECT REAR PLANETARY RING GEAR FLANGE SUB-ASSEMBLY Transmission Unit

61. INSPECT INTERMEDIATE SHAFT Transmission Unit

62. REMOVE BRAKE PLATE STOPPER SPRING

(a) Remove the brake plate stopper spring from the case.
63. REMOVE NO. 4 BRAKE DISC

(a) Remove the 7 plates, the 8 discs and the 2 flanges from the case.
64. INSPECT NO. 4 BRAKE DISC Transmission Unit

65. REMOVE REAR PLANETARY GEAR ASSEMBLY

(a) Remove the rear planetary gear assembly from the case.

(b) Remove the No. 9 thrust bearing race and the thrust needle roller bearing from the rear planetary gear assembly.

(c) Remove the thrust needle roller bearing from the case.
66. INSPECT REAR PLANETARY GEAR ASSEMBLY Transmission Unit

67. REMOVE 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY

(a) Place SST on the spring retainer and compress the brake return spring.
SST: 09350-30020
09350-07050
(b) Using SST, remove the snap ring and the brake return spring.
SST: 09350-30020
09350-07070
68. INSPECT 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY Transmission Unit

69. REMOVE 1ST AND REVERSE BRAKE PISTON

(a) Hold the 1st and reverse brake piston and apply compressed air (392 kPa, 4 kgf/cm2, 57 psi) to the transmission case to remove the 1st and reverse brake piston.
HINT: If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers.

(b) Remove the O-ring from 1st and reverse brake piston.
70. REMOVE BRAKE REACTION SLEEVE

(a) Using SST, remove the reaction sleeve.
SST: 09350-30020
09350-07080
(b) Remove the O-ring from the reaction sleeve.
71. REMOVE NO. 4 BRAKE PISTON

(a) Using SST, remove the No. 4 brake piston.
SST: 09350-30020
09350-07090
(b) Remove the 2 O-rings from the No. 4 piston.