Part 1

AA80F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION UNIT: DISASSEMBLY

1. REMOVE TRANSMISSION CONTROL SHAFT LEVER RH

(a) Remove the nut, spring washer and transmission control shaft lever RH.

2. REMOVE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Using a screwdriver, bend the tabs of the lock washer.

(b) Remove the nut and lock washer.

(c) Remove the bolt and park/neutral position switch assembly.

HINT
Make sure that the manual valve lever shaft has not been rotated prior to installing the park/neutral position switch as the detent spring may become detached from the manual valve lever shaft.

3. REMOVE OIL COOLER TUBE UNION

(a) Remove the 2 oil cooler tube elbows.

(b) Remove the O-rings from the oil cooler tube elbows.

4. REMOVE NO. 1 BREATHER PLUG

5. REMOVE AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY

NOTICE:
Do not turn the transmission over as this will contaminate the valve body with foreign matter located at the bottom of the pan.

(a) Remove the overflow plug and gasket.

(b) Remove the drain plug and gasket.

(c) Remove the 9 bolts, automatic transmission oil pan and gasket.

(d) Examine the particles in the pan.

(1) Remove the magnets from the oil pan. Use the removed magnets to collect any steel chips. Look carefully at the chips and particles in the pan and on the magnet to anticipate the type of wear which might be found in the transmission.

Steel (magnetic): bearing, gear and plate wear

Brass (non-magnetic): bush wear

6. REMOVE VALVE BODY OIL STRAINER ASSEMBLY

(a) Remove the 4 bolts and valve body oil strainer assembly from the transmission valve body assembly.

(b) Remove the O-ring from the valve body oil strainer assembly.

7. REMOVE TRANSMISSION VALVE BODY ASSEMBLY

(a) Remove the bolt, lock plate and ATF temperature sensor.

(b) Remove the oil pressure switch connector.

(c) Disconnect the 9 connectors from the solenoid valves.

(d) Remove the bolt, detent spring cover and detent spring.

(e) Remove the 17 bolts and transmission valve body assembly.

NOTICE:
Do not drop the check ball body or spring.

(f) Disconnect the lever pin from the manual valve.

NOTICE:
Do not drop the manual valve.

8. REMOVE CHECK BALL BODY

(a) Remove the check ball body and spring.

9. REMOVE TRANSMISSION WIRE

(a) Disconnect the 3 connectors from the 3 speed sensors.

(b) Remove the bolt and pull out the transmission wire.

10. REMOVE SPEED SENSOR

(a) Remove the 2 bolts and 2 speed sensors (NC3 and SP2).

(b) Using a T30 ''TORX'' wrench, remove the bolt and speed sensor NT.

11. REMOVE AUTOMATIC TRANSMISSION CASE PLUG

(a) Remove the automatic transmission case plug and O-ring.

12. REMOVE PARKING LOCK PAWL BRACKET

(a) Remove the 3 bolts and parking lock pawl bracket.

13. REMOVE PARKING LOCK ROD SUB-ASSEMBLY

(a) Disconnect the parking lock rod from the manual valve lever.

14. REMOVE PARKING LOCK PAWL SHAFT

(a) Pull out the parking lock pawl shaft from the front side, and then remove the parking lock pawl and spring.

(b) Remove the E-ring from the shaft.

15. REMOVE MANUAL VALVE LEVER SUB-ASSEMBLY

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

(b) Using a pin punch and hammer, tap out the spring pin.

HINT
Slowly tap 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.

16. REMOVE MANUAL VALVE LEVER SHAFT OIL SEAL

(a) Using a screwdriver, pry out the oil seal.

Text in Illustration

HINT
Tape the screwdriver tip before use.

17. REMOVE OIL PUMP ASSEMBLY

(a) Remove the 11 bolts from the transmission case.

(b) Pull out the oil pump assembly.

NOTICE:
Do not damage the oil pump assembly.

(c) Remove the O-ring from the oil pump assembly.

18. REMOVE OVERDRIVE AND REVERSE CLUTCH DRUM SUB-ASSEMBLY AND FRONT PLANETARY GEAR ASSEMBLY WITH NO. 1 BRAKE DISC SET

(a) Remove the overdrive and reverse clutch drum sub-assembly and front planetary gear assembly with No. 1 brake disc set from the transmission case.

(b) Remove the thrust needle roller bearing and thrust bearing race.

19. REMOVE NO. 1 BRAKE DISC SET

(a) Remove the 5 plates, 5 discs and No. 1 brake flange.

20. INSPECT NO. 1 BRAKE DISC Automatic Transmission Unit

21. REMOVE FRONT PLANETARY GEAR ASSEMBLY

(a) Remove the front planetary gear assembly with the front planetary sun gear from the overdrive and reverse clutch drum sub-assembly.

(b) Remove the 3 clutch drum oil seal rings.

(d) Remove the 2 clutch drum oil seal rings.

(e) Remove the planetary sun gear.

22. INSPECT FRONT PLANETARY GEAR ASSEMBLY Automatic Transmission Unit

23. REMOVE OVERDRIVE CLUTCH DISC SET

(a) Using a screwdriver, remove the snap ring from the overdrive direct clutch drum.

Text in Illustration

HINT
Tape the screwdriver tip before use.

(b) Remove the flange, 4 discs and 4 plates from the drum.

24. INSPECT OVERDRIVE CLUTCH DISC Automatic Transmission Unit

25. REMOVE REVERSE CLUTCH DISC SET

(a) Using a screwdriver, remove the hole snap ring from the reverse clutch drum.

Text in Illustration

HINT
Tape the screwdriver tip before use.

(b) Remove the flange, 5 discs, 5 plates and cushion plate from the reverse clutch drum.

26. INSPECT REVERSE CLUTCH DISC Automatic Transmission Unit

27. REMOVE REVERSE CLUTCH PISTON

(a) Place SST on the reverse clutch balancer and compress the reverse clutch return spring with a press.

SST : 09380-50010

(b) Using SST, remove the snap ring.

SST : 09350-30020

09350-07070

(c) Remove the reverse clutch balancer and reverse clutch return spring sub-assembly from the reverse clutch drum.

(d) Hold the reverse clutch piston and apply compressed air to the oil hole of the reverse clutch drum to remove the reverse clutch piston.

Text in Illustration

(e) Remove the O-ring from the reverse clutch piston.

28. INSPECT REVERSE CLUTCH RETURN SPRING SUB-ASSEMBLY Automatic Transmission Unit

29. REMOVE REVERSE CLUTCH DRUM SUB-ASSEMBLY

(a) Remove the reverse clutch drum sub-assembly from the overdrive direct clutch drum sub-assembly.

HINT
The reverse clutch drum is easier to remove if a hole snap ring is installed. Use the hole snap ring from the "REMOVE REVERSE CLUTCH DISC SET" procedure.

(b) Remove the 3 O-rings from the reverse clutch drum.