Part 1

A750E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION UNIT: REASSEMBLY

REASSEMBLY

1. BEARING POSITION

Bearing diameter:

2. INSTALL NO. 4 BRAKE PISTON
(a) Coat 2 new O-rings with Toyota Genuine ATF WS or equivalent, and install them onto the brake reaction sleeve.
(b) Coat 2 new O-rings with Toyota Genuine ATF WS or equivalent, and install them onto the No. 4 brake piston.
(c) Install the No. 4 brake piston onto the reaction sleeve.

3. INSTALL BRAKE REACTION SLEEVE
(a) With the No. 4 brake piston underneath (the rear side), install the brake reaction sleeve and No. 4 brake piston onto the transmission case.
NOTE: Be careful not to damage the O-rings.

4. INSTALL 1ST AND REVERSE BRAKE PISTON

(a) Coat a new O-ring with Toyota Genuine ATF WS or equivalent.
(b) Install the O-ring onto the 1st and reverse brake piston.
(c) With the spring seat of the piston facing upward (the front side), place the piston in the transmission case.
NOTE: Be careful not to damage the O-ring.

(d) Place the 1st and reverse brake return spring onto the 1st and reverse brake piston.

5. INSTALL 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY
(a) Place SST on the spring retainer, and compress the return spring.
SST: 09350-30020
09350-07050
(b) Using SST, install the snap ring.
SST: 09350-30020
09350-07070
6. INSTALL REAR PLANETARY GEAR ASSEMBLY

(a) Install the thrust needle roller bearing.
Thrust needle roller bearing diameter:

(b) Install the thrust needle roller bearing.
(c) Coat the No. 9 thrust bearing race with petroleum jelly, and install it onto the rear planetary gear.
Bearing and race diameter:

(d) Install the rear planetary gear assembly.
7. INSPECT PACK CLEARANCE OF FIRST AND REVERSE BRAKE

(a) Make sure the 1st and reverse brake pistons move smoothly when applying and releasing the compressed air into the transmission case.

(b) Using vernier calipers, measure the level difference (length A) between the upper surface of the 1st and reverse brake piston and the hitting surface of the No. 4 brake flange at both ends across a diameter, and calculate the average.
NOTE: The 1st and reverse brake piston must be installed tightly to the end face of the transmission case.
HINT: Length A = 36.35 to 37.09 mm (1.431 to 1.460 in.)

(c) Using vernier calipers, measure the thickness (length B) of the 2 brake flanges, the 7 No. 4 brake plates and the 8 No. 4 brake discs altogether at both ends across a diameter, and calculate the average.
HINT: Pack clearance = Length A - Length B - 0.25 mm - 1.8 mm
Length B = 36.04 to 37.14 mm (1.419 to 1.462 in.)

Pack clearance:
0.8 to 1.1 mm (0.031 to 0.043 in.)
(d) If the pack clearance is outside the standard, select and install a brake flange that makes the pack clearance within the standard.
H thickness:

8. INSTALL NO. 4 BRAKE DISC
(a) Install the 7 plates, the 8 discs and the 2 flanges.
Install in order:
F - D - P - D - P - D- P - D -P - D - P - D - P - D - P - D - F
HINT: P = Plate, D = Disc, F = Flange

9. INSTALL BRAKE PLATE STOPPER SPRING
(a) Install the brake stopper spring.

10. INSTALL REAR PLANETARY RING GEAR FLANGE SUB-ASSEMBLY
(a) Install the No. 8 thrust bearing race, thrust needle roller bearing, No. 7 thrust bearing race and planetary ring gear flange onto the intermediate shaft.
Bearing and race diameter:

(b) Install the rear planetary ring gear flange onto the intermediate shaft.

11. INSTALL NO. 3 1-WAY CLUTCH ASSEMBLY
(a) Install the No. 3 1-way clutch assembly and 1-way clutch inner race onto the intermediate shaft.
12. INSTALL INTERMEDIATE SHAFT

(a) Install the intermediate shaft with the No. 3 1-way clutch assembly into the case.

(b) Using SST, install the snap ring.
SST: 09350-30020
09350-07050
09350-07060

13. INSTALL CENTER PLANETARY GEAR ASSEMBLY
(a) Install the center planetary gear assembly and planetary sun gear into the case.
(b) Coat the No. 4 thrust bearing race and thrust needle roller bearing with petroleum jelly, and install them onto the center planetary ring gear.
Race and Bearing diameter:

14. INSTALL NO. 2 BRAKE PISTON
(a) Coat 2 new O-rings with Toyota Genuine ATF WS or equivalent, and install them onto the No. 2 brake piston.
(b) Be careful not to damage the O-rings. Press the No. 2 brake piston into the No. 2 brake cylinder with both hands.
(c) Install the No. 2 brake piston onto the case.
15. INSTALL NO. 2 BRAKE DISC

(a) Install flange, 3 plates, 3 discs and No. 2 brake piston return spring.
Install in order:
F - D - P - D - P - D - P
HINT: P = Plate, D = Disc, F = Flange

(b) Using SST and press, install the No. 2 brake spring snap ring.
SST: 09351-40010

16. INSTALL NO. 1 BRAKE PISTON
(a) Coat 2 new O-rings with Toyota Genuine ATF WS or equivalent, and install them onto the No. 1 brake piston.
(b) Be careful not to damage the O-rings. Press the No. 1 brake piston into the No. 1 brake cylinder with both hands.

17. INSTALL BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
(a) Install the brake piston return spring and the No. 1 brake piston with the No. 1 brake cylinder into the transmission case.

18. INSTALL BRAKE PISTON RETURN SPRING SNAP RING
(a) Using SST and a press, install the brake piston return spring snap ring.
SST: 09351-40010

19. INSTALL NO. 1 BRAKE DISC
(a) Install the 3 plates, 3 discs and flange.
Install in order:
F - D - P - D - P - D - P
HINT: P = Plate, D = Disc, F = Flange

20. INSTALL CENTER PLANETARY RING GEAR

(a) Install the center planetary ring gear and front planetary ring gear flange into the front planetary ring gear.

(b) Using a screwdriver, install the snap ring.

21. INSTALL FRONT PLANETARY RING GEAR
(a) Install the front planetary ring gear into the case.
22. INSTALL FRONT PLANETARY GEAR ASSEMBLY

(a) Install the thrust needle roller bearing and the No. 2 planetary carrier thrust washer.
(b) Coat the No. 3 thrust bearing race with petroleum jelly, and install it onto the front planetary ring gear.
Thrust needle roller bearing and race diameter:

(c) Install the front planetary gear assembly and 1-way clutch inner race into the case.
23. INSPECT NO. 1 PISTON STROKE OF BRAKE PISTON

(a) Make sure the No. 1 brake piston moves smoothly when applying and releasing the compressed air into the transmission case.

(b) Using a feeler gauge, measure the B3 brake pack clearance between the snap ring and flange.
Piston stroke:
0.42 to 0.72 mm (0.017 to 0.028 in.)
If the piston stroke is outside the specification, parts may have been assembled incorrectly.
Perform the reassembly again.
If the piston stroke is still outside the specification, select another flange.
HINT: There are 4 different thicknesses for the flange.

Flange thickness:

24. INSTALL 2ND BRAKE PISTON

(a) Coat 2 new O-rings with Toyota Genuine ATF WS or equivalent, and install them onto the 2nd brake piston.
(b) Be careful not to damage the O-rings. Press the 2nd brake cylinder into the 2nd brake piston with both hands.

(c) Using SST and press, install the snap ring.
SST: 09351-40010
NOTE: Make sure that the end gap of the snap ring is not aligned with the spring retainer claw.

25. INSTALL 2ND BRAKE CYLINDER
(a) Install the 2nd brake cylinder into the case.

26. INSTALL 1-WAY CLUTCH ASSEMBLY
(a) Install the 1-way clutch assembly and the thrust washer into the case.

27. INSTALL 2ND BRAKE PISTON HOLE SNAP RING
(a) Using SST, install the snap ring.
SST: 09350-30020
09350-07060

28. INSTALL NO. 3 BRAKE DISC
(a) Install the flange, the 4 discs, the 4 plates and the cushion plate into the case.
Install in order:
F - D - P - D - P - D - P - D - P - C
HINT: P = Plate, D = Disc, F = Flange C = Cushion

29. INSTALL NO. 3 BRAKE SNAP RING
(a) Using a screwdriver, install the snap ring.

30. INSTALL NO. 2 1-WAY CLUTCH ASSEMBLY
(a) Install the No. 2 1-way clutch assembly and No. 2 clutch drum thrust washer onto the clutch drum and input shaft.
31. INSTALL CLUTCH DRUM AND INPUT SHAFT ASSEMBLY

(a) Install the thrust needle roller bearing.
(b) Coat the race with petroleum jelly and install it onto the clutch drum thrust washer.
Thrust needle roller bearing and diameter: