Part 1

A750F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION UNIT: REASSEMBLY

REASSEMBLY

1. BEARING POSITION
(a) Check bearing position.





Bearing diameter:






2. ASSEMBLE NO. 4 BRAKE PISTON AND BRAKE REACTION SLEEVE





(a) Coat 2 new O-rings with ATF, and install them to the brake reaction sleeve.
(b) Coat 2 new O-rings with ATF, and install them to the No. 4 brake piston.
(c) Install the No. 4 brake piston to the reaction sleeve.





3. INSTALL NO. 4 BRAKE PISTON WITH BRAKE REACTION SLEEVE
(a) Install the No. 4 brake piston with brake reaction sleeve to the transmission case
NOTICE:
- Do not damage the O-rings.
- Make sure the No. 4 brake piston is underneath the brake reaction sleeve.

4. INSTALL 1ST AND REVERSE BRAKE PISTON





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





(d) Place the piston return spring onto the No. 4 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 ring gear.
Bearing and race diameter:










(d) Install the rear planetary gear assembly.
7. INSPECT PACK CLEARANCE OF 1ST AND REVERSE BRAKE





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





(b) Using a vernier caliper, 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 (1.43 to 1.46 in.)





(c) Using a vernier caliper, measure the thickness (length B) of the 2 brake flanges, 7 No. 4 brake plates and 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 to 1.8 mm (0.00984 to 0.0709 in.)
Length B = 36.04 to 37.14 mm (1.42 to 1.46 in.)

Standard pack clearance:
0.8 to 1.1 mm (0.0315 to 0.0433 in.)
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 2 flanges, 8 discs and 7 plates.
Install in order:
F - D - P - D - P - D - P - D - P - D - P - D - P - D - P - D - F
HINT: F = Flange
D = Disc
P = Plate





9. INSTALL BRAKE PLATE 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 to the intermediate shaft.
Bearing and race diameter:






11. INSTALL NO. 3 1-WAY CLUTCH ASSEMBLY





(a) Install the 1-way clutch and 1-way clutch inner race to the intermediate shaft.
12. INSTALL INTERMEDIATE SHAFT





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





(b) Using SST, install the snap ring.
SST: 09350-30020
09350-07060
13. INSTALL CENTER PLANETARY GEAR ASSEMBLY





(a) Install the planetary sun gear and center planetary gear to the case.
(b) Coat the thrust bearing race with petroleum jelly, and install it onto the center planetary ring gear.
Race diameter:






14. INSTALL NO. 2 BRAKE PISTON





(a) Coat 2 new O-rings with ATF, and install them to the brake piston.
(b) Press the brake piston into the brake cylinder with both hands.
NOTE: Be careful not to damage the O-rings.

(c) Install the No. 2 brake piston to the case.
15. INSTALL NO. 2 BRAKE DISC





(a) Install the brake piston return spring.
(b) Install the 3 plates, 3 discs and flange.
Install in order:
D - P - D - P - D - P - F
HINT: D = Disc
P = Plate
F = Flange





(c) Using SST and press, compress the return spring and install the No. 2 brake spring snap ring.
SST: 09351-40010
16. INSTALL NO. 1 BRAKE PISTON





(a) Coat 2 new O-rings with ATF, and install them on the brake piston.
(b) Press the brake piston into the brake cylinder with both hands.
NOTE: Be careful not to damage the O-rings.

17. INSTALL BRAKE PISTON RETURN SPRING SUB-ASSEMBLY





(a) Install the brake piston return spring and the No. 1 brake piston with No. 1 brake cylinder on the transmission case.
18. INSTALL BRAKE PISTON RETURN SPRING SNAP RING





(a) Using SST and a press, compress the return spring and install the brake piston return spring snap ring.
SST: 09351-40010
19. INSTALL NO. 1 BRAKE DISC





(a) Install the 4 plates, 4 discs and flange.
Install in order:
P - D - P - D - P - D - P - D - F
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 on 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 and thrust needle roller bearing on the case.
Thrust needle roller bearing diameter:






22. INSTALL FRONT PLANETARY GEAR ASSEMBLY





(a) Install the thrust washer and thrust needle roller bearing.
(b) Coat the thrust 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 to 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.
Standard piston stroke:
0.42 to 0.72 mm (0.0165 to 0.0283 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: