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Home >> Lexus >> 2008 >> GS 350 RWD V6-3.5L (2GR-FSE) >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Service and Repair >> Overhaul >> A760H Automatic Transmission >> Transmission Unit >> Reassembly >> Part 1

Part 1









A760H AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION UNIT: REASSEMBLY

Part 1 of 2

1. BEARING POSITION









2. INSTALL BRAKE PISTON NO.4






(a) Coat 2 new O-rings with ATF, and install them to brake reaction sleeve.
(b) Coat 2 new O-rings with the ATF, and install them to the brake piston No.4.
(c) Install the brake piston No.4 to the reaction sleeve.
NOTICE:
Be careful not to damage the O-rings.

3. INSTALL BRAKE REACTION SLEEVE






(a) With the brake piston No.4 underneath (the rear side), install the brake reaction sleeve with the brake piston No.4 to the transmission case.
NOTICE:
Be careful not to damage the O-rings.

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.
NOTICE:
Be careful not to damage the O-ring.





(d) Place the brake return spring onto the brake piston.
5. INSTALL 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY






(a) Place SST on the brake return spring, and compress the return spring.
SST: 09350-30020
09350-07050
(b) Using SST, install the snap ring.
SST: 09350-30020
09350-07070






(c) Install the brake apply tube with its protruding part fitting into the groove of the transmission case as shown in the illustration.
NOTICE:
Engage the 1st and reverse brake piston claw with the protrusion of the brake apply tube.

6. INSTALL REAR PLANETARY GEAR ASSEMBLY






(a) Install the thrust bearing race No.9.
Race diameter:










(b) Install the 2 thrust needle roller bearings.
Thrust needle roller Bearing diameter:










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

8. INSTALL BRAKE DISC NO.4






(a) Install the sleeve, 4 plates, the 4 discs and the flange.
Install in order:
P = Plate, D = Disc, F = Flange, S = Sleeve
F - D - P - D - P - D - P - D - P - S
9. INSTALL BRAKE PLATE STOPPER SPRING






(a) Install the brake plate stopper spring.
10. INSTALL REAR PLANETARY RING GEAR FLANGE SUB-ASSEMBLY






(a) Install the thrust bearing race No.8, the thrust needle roller bearing, the thrust bearing race No.7 and the planetary ring gear flange to the intermediate shaft.
Bearing and race diameter:






11. INSTALL 1 WAY NO.3 CLUTCH ASSEMBLY






(a) Install the 1 way No.3 clutch assembly and the 1 way clutch inner race to the intermediate shaft.
12. INSTALL INTERMEDIATE SHAFT






(a) Install the intermediate shaft with 1 way No.3 clutch assembly to the transmission 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 the planetary sun gear to the transmission case.
(b) Coat the thrust bearing race with petroleum jelly, and install it onto the center planetary ring gear.
Race diameter:






14. INSTALL BRAKE PISTON NO.2






(a) Coat 2 new O-rings with ATF, and install them to the brake piston No.2.
(b) Being careful not to damage the O-rings, press the brake piston No.2 into the brake cylinder No.2.
(c) Install the brake cylinder No.2 to the transmission case.
HINT:
Install the brake cylinder No.2 so that the projection protrudes from the upside of the transmission case.





(d) Check that the oil pressure apply hole of the brake cylinder No.2 aligns with the oil pressure apply hole of the transmission case.
15. INSTALL BRAKE DISC NO.2






(a) Install the 2 flanges, the 3 plates, 4 discs and brake piston return spring.
Install in order:
P = Plate, D = Disc, F = Flange
F - D- P - D - P - D - P - D - F






(b) Using SST and a press, install the brake No.2 snap ring.
SST: 09351-40010
09351-04010
09351-04020
09351-04040
09351-04050
16. INSPECT PISTON STROKE OF BRAKE PISTON NO.2 Transmission Unit

17. INSTALL BRAKE PISTON NO.1






(a) Coat 2 new O-rings with ATF, and install them on the brake piston No.1.
(b) Be careful not to damage the O-rings. Press the brake piston No.1 into the brake cylinder No.1.
18. INSTALL BRAKE PISTON RETURN SPRING SUB-ASSEMBLY






(a) Install the brake piston return spring and the brake piston No.1 with the brake cylinder No.1 to the transmission case.
HINT:
Install the brake cylinder No.1 so that the projection protrudes from the upside of the transmission case.





(b) Check that the oil pressure apply hole of the brake cylinder No.1 aligns with the oil pressure apply hole of the transmission case.
19. INSTALL BRAKE PISTON RETURN SPRING SNAP RING






(a) Using SST and a press, install the brake piston return spring snap ring.
SST: 09351-40010
09351-04010
09351-04030
09351-04040
09351-04050
20. INSTALL CENTER PLANETARY RING GEAR
(a) Install the thrust needle roller bearing to the front planetary ring gear flange.
Thrust needle roller bearing diameter:










(b) Install the center planetary ring gear and the front planetary ring gear flange on the front planetary ring gear.






(c) Using a screwdriver, install the snap ring.
NOTICE:
Install the snap ring to the ring gear so that the both ends of the snap ring come to the center of a protrusion on the ring gear.

21. INSTALL FRONT PLANETARY RING GEAR






(a) Install the front planetary ring gear to the transmission case.
22. INSTALL FRONT PLANETARY GEAR ASSEMBLY






(a) Install the thrust needle roller bearing and the thrust washer.
(b) Coat the 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 the 1 way clutch inner race to the transmission case.
23. INSPECT PISTON STROKE OF BRAKE PISTON NO.1 Transmission Unit

24. INSTALL BRAKE DISC NO.1






(a) Install the 3 plates, the 3 discs and the flange.
Install in order:
P = Plate, D = Disc, F = Flange
F - D - P - D - P - D - P
25. INSTALL 2ND BRAKE PISTON






(a) Coat 2 new O-rings with ATF, and install them to the 2nd brake piston.
(b) Be careful not to damage the O-rings. Press the 2nd brake piston into the 2nd brake cylinder.
(c) Place the brake piston return spring on the 2nd brake piston.






(d) Using SST and a press, install the snap ring.
NOTICE:
Be sure that the end gap of the snap ring is not aligned with the spring retainer claw.

SST: 09351-40010
09351-04060
09351-04070
26. INSTALL 2ND BRAKE CYLINDER






(a) Install the 2nd brake cylinder to the transmission case.






(b) Check that the oil pressure apply hole of the 2nd brake cylinder aligns with the oil pressure apply hole of the transmission case.
27. INSTALL 1 WAY CLUTCH ASSEMBLY






(a) Install the 1 way clutch assembly and the thrust washer to the transmission case.

Continued in Part 2 Part 2
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