Part 1

AA80E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION UNIT: DISASSEMBLY

1. REMOVE HARNESS BRACKET

(a) Remove the 2 bolts and harness brackets.

2. REMOVE TRANSMISSION CONTROL SHAFT LEVER RH

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

3. 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.

4. REMOVE OIL COOLER TUBE UNION

(a) Remove the 2 oil cooler tube unions.

(b) Remove the 2 O-rings from the 2 oil cooler tube unions.

5. REMOVE NO. 1 BREATHER PLUG

(a) Remove the No. 1 breather plug.

6. REMOVE AUTOMATIC TRANSMISSION FLANGE YOKE ASSEMBLY

(a) Using SST and a hammer, loosen the staked part of the nut.

SST : 09930-00010

(b) Using SST and a 30 mm socket wrench, remove the nut.

SST : 09330-00021

SST : 09950-30012

09955-03040

(c) Remove SST.

(d) Tap the flange yoke with a plastic-faced hammer to remove it.

(e) Remove the 2 rear No. 1 output shaft bearing spacers and rear cover sleeve.

(f) Using a screwdriver, pry out the oil seal from the flange yoke.

7. 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, 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

8. REMOVE VALVE BODY OIL STRAINER ASSEMBLY

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

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

9. REMOVE TRANSMISSION VALVE BODY ASSEMBLY

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

(b) Remove the O-ring from the ATF temperature sensor.

(c) Disconnect the 8 connectors from the solenoid valves.

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

(e) Remove the 17 bolts.

(f) Remove the valve body.

(g) Disconnect the manual valve connecting rod from the manual valve lever sub-assembly.

10. REMOVE CHECK BALL BODY

(a) Remove the check ball body and spring.

11. REMOVE TRANSMISSION WIRE

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

(b) Remove the O-ring from the speed sensor NT.

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

(d) Remove the O-ring from the transmission wire connector.

12. 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.

13. REMOVE AUTOMATIC TRANSMISSION CASE PLUG

(a) Remove the plug and O-ring.

14. REMOVE PARKING LOCK PAWL BRACKET

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

15. REMOVE PARKING LOCK ROD SUB-ASSEMBLY

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

16. REMOVE PARKING LOCK PAWL SHAFT

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

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

17. REMOVE MANUAL VALVE LEVER SUB-ASSEMBLY

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

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

HINT
Slowly tap out the spring pin so that it will not fall into the transmission case.

(c) Pull the manual valve lever shaft out through the case, and remove the manual valve lever sub-assembly.

18. REMOVE MANUAL VALVE LEVER SHAFT OIL SEAL

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

19. REMOVE OIL PUMP ASSEMBLY

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

(b) Pull out the oil pump.

NOTICE:
Do not damage the oil pump.

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

20. REMOVE OVERDRIVE AND REVERSE CLUTCH DISC ASSEMBLY AND FRONT PLANETARY GEAR ASSEMBLY WITH NO. 1 BRAKE DISC SET

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

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

21. REMOVE NO. 1 BRAKE DISC SET

(a) Remove the 5 plates, 5 discs and flange.

22. INSPECT NO. 1 BRAKE DISC Transmission Unit

23. REMOVE FRONT PLANETARY GEAR ASSEMBLY

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

(b) Remove the 3 oil seal rings.

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

(e) Remove the front planetary sun gear.

24. INSPECT FRONT PLANETARY GEAR ASSEMBLY Transmission Unit

25. REMOVE OVERDRIVE CLUTCH DISC SET

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

(b) Remove the flange, 4 discs and 4 plates from the overdrive direct clutch drum sub-assembly.

26. INSPECT OVERDRIVE CLUTCH DISC Transmission Unit

27. REMOVE REVERSE CLUTCH DISC SET

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

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

28. INSPECT REVERSE CLUTCH DISC Transmission Unit

29. REMOVE REVERSE CLUTCH PISTON

(a) Place SST on the reverse clutch balancer, and compress the 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 piston return spring from the reverse clutch drum sub-assembly.

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

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

30. INSPECT REVERSE CLUTCH RETURN SPRING SUB-ASSEMBLY Transmission Unit