UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE ASSEMBLY: REMOVAL; 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024

Last Modified: 12-11-2024	6.11:8.1.0	Doc ID: RM100000002OT8D
Model Year Start: 2025	Model: GR Corolla	Prod Date Range: [09/2024 - ]
Title: UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE ASSEMBLY: REMOVAL; 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 - ]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during automatic transaxle assembly removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
1:w/ Steering Lock Function 2: Not necessary when ECM replaced with new one. 3: If transaxle compensation code read from ECM 4: If transaxle compensation code not read from ECM
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on
	ECU configuration	-
	Update ECU security key	Vehicle Control History (RoB) are stored
	Heavy Knock History	-
	ECU communication ID registration (Immobiliser system)	Engine start function
	Code registration (Smart Key System (for Gasoline Model, Start Function))	Wireless Door Lock Control System (for Gasoline Model with Smart Key System) Smart Key System (for Gasoline Model, Entry Function) Smart Key System (for Gasoline Model, Start Function) Steering lock function*1
	Perform reset memory2 Transfer transaxle compensation code3 Reset transaxle compensation code*4 Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Registration:
Replacement of engine assembly Gas leaks from exhaust system is repaired	Inspection after repair	Poor idle, etc. Engine start function, etc.
Automatic transaxle assembly	Perform reset memory Input transaxle compensation code into ECM Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Registration:
Automatic transaxle fluid	ATF thermal degradation estimate reset	The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly
Front wheel alignment adjustment	Perform "Reset Memory" Perform "Calibration"	VSC is disabled or malfunctions DTCs are output Slip indicator light illuminates ABS warning light illuminates
Tire	ECU Data Initialization (When performing tire replacement after RoB code X2104 is output)	Active Torque Split AWD System

CAUTION:

The engine assembly with transaxle is very heavy. Be sure to follow the procedure described in the repair manual, or the engine lifter may suddenly drop or the engine assembly with transaxle may fall off the engine lifter.

*a	An Object Exceeding Weight Limit of Engine Lifter

To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.

The automatic transaxle assembly is very heavy. Be sure to follow the procedure described in the repair manual, or the transmission jack may suddenly drop.

*a	An Object Exceeding Weight Limit of Transmission Jack

NOTICE:

If automatic transaxle assembly parts are replaced, refer to Parts Replacement Compensation Table to determine if any additional operations are necessary.

Click here

HINT:

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

Learning completes when vehicle is driven

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
Front Camera System	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.

Learning completes when vehicle is operated normally

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
Power door lock control system Back door opener	Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.

PROCEDURE

1. REMOVE ENGINE ASSEMBLY WITH TRANSAXLE

Click here

2. DISCONNECT WIRE HARNESS

(a) Disconnect the air fuel ratio sensor connector.

(b) Disengage the 2 clamps.

3. REMOVE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY

Click here

4. REMOVE EXHAUST PIPE CLAMP

Click here

5. REMOVE OUTLET TURBINE ELBOW GASKET

Click here

6. DISCONNECT TRANSMISSION BREATHER HOSE SUB-ASSEMBLY

(a) Disengage the clamp to disconnect the transmission breather hose sub-assembly from the flexible hose bracket.

7. SEPARATE ENGINE WIRE

(a) Disengage the clamp and guide.

(b) Remove the 2 bolts.

(d) Disengage the claw, rotate the lever and disconnect the transmission wire connector.

(e) Disconnect the park/neutral position switch assembly connector.

(f) Disengage the clamp to disconnect the No. 1 fuel vapor feed hose.

(g) Remove the bolt.

(h) Disengage the 2 clamps.

(i) Disengage the 3 clamps.

8. DISCONNECT OUTLET NO. 1 OIL COOLER HOSE

(a) Slide the clip and disconnect the outlet No. 1 oil cooler hose from the oil cooler union sub-assembly.

HINT:

Use a container to catch any automatic transaxle fluid which flows out.

9. DISCONNECT NO. 1 TRANSMISSION OIL COOLER HOSE

(a) Slide the clip and disconnect the No. 1 transmission oil cooler hose from the No. 1 oil cooler tube sub-assembly without hose.

HINT:

Use a container to catch any automatic transaxle fluid which flows out.

10. DISCONNECT NO. 4 WATER BY-PASS HOSE

Click here

11. DISCONNECT NO. 5 WATER BY-PASS HOSE

Click here

12. REMOVE TRANSMISSION OIL COOLER

Click here

13. REMOVE NO. 2 TRANSMISSION OIL COOLER BRACKET

(a) Remove the 3 bolts and No. 2 transmission oil cooler bracket from the transaxle housing.

14. REMOVE FLYWHEEL HOUSING SIDE COVER

Click here

15. REMOVE STARTER ASSEMBLY

Click here

16. REMOVE FLYWHEEL HOUSING UNDER COVER

(a) Remove the flywheel housing under cover from the cylinder block sub-assembly.

17. REMOVE DRIVE PLATE AND TORQUE CONVERTER ASSEMBLY SETTING BOLT

(a) Turn the crankshaft to gain access to the 6 drive plate and torque converter assembly setting bolts and remove each drive plate and torque converter assembly setting bolt while holding the crankshaft pulley set bolt with a wrench.

HINT:

There will be one black colored drive plate and torque converter assembly setting bolt.

18. REMOVE FRONT SUSPENSION CROSSMEMBER SUB-ASSEMBLY

(a) Remove the bolt and front suspension crossmember sub-assembly from the No. 2 engine moving control rod.

19. REMOVE NO. 2 ENGINE MOVING CONTROL ROD

(a) Remove the 4 bolts and No. 2 engine moving control rod from the transaxle housing.

20. REMOVE PROPELLER SHAFT HEAT INSULATOR

(a) Remove the 2 bolts and propeller shaft heat insulator from the transfer assembly.

21. REMOVE AUTOMATIC TRANSAXLE ASSEMBLY

(a) Support the automatic transaxle assembly with a transmission jack.

NOTICE:

Secure the automatic transaxle assembly to the transmission jack using a suitable adapter, such as a rope or attachment.

(b) Remove the 7 bolts and automatic transaxle assembly from the engine assembly.

NOTICE:

To prevent damage to the 2 knock pins, do not pry between the automatic transaxle assembly and engine assembly.

22. REMOVE TORQUE CONVERTER ASSEMBLY

(a) Remove the torque converter assembly from the automatic transaxle assembly.

23. REMOVE EXHAUST PIPE SUPPORT STAY

(a) Remove the 2 bolts and exhaust pipe support stay from the transaxle housing.

24. REMOVE TRANSFER ASSEMBLY

Click here

25. REMOVE NO. 1 OIL COOLER TUBE SUB-ASSEMBLY WITHOUT HOSE

(a) Remove the bolt and No. 1 oil cooler tube sub-assembly without hose from the oil cooler union sub-assembly.

26. REMOVE TRANSMISSION BREATHER HOSE SUB-ASSEMBLY

(a) Using a screwdriver with its tip wrapped with protective tape, remove the transmission breather hose sub-assembly from the No. 1 breather plug (ATM).

NOTICE:

Be careful not to damage the No. 1 breather plug (ATM).

(b) Disengage the 2 clamps.

27. REMOVE WIRING HARNESS CLAMP

(a) Disengage the 2 clamps to remove the 2 wiring harness clamps from the automatic transaxle case sub-assembly.

28. REMOVE WIRE HARNESS CLAMP BRACKET

(a) Remove the bolt and wire harness clamp bracket from the transmission case side cover.

(b) Remove the bolt and wire harness clamp bracket from the automatic transaxle case sub-assembly.

29. REMOVE EXHAUST SENSOR CLAMP BRACKET

(a) Remove the bolt and exhaust sensor clamp bracket from the automatic transaxle case sub-assembly.

30. REMOVE NO. 1 TRANSMISSION CONTROL CABLE BRACKET

(a) Remove the 2 bolts and No. 1 transmission control cable bracket from the automatic transaxle case sub-assembly.

31. REMOVE TRANSMISSION CASE PLUG ASSEMBLY

(a) Remove the transmission case plug assembly from the transaxle housing.

32. REMOVE TRANSFER AND TRANSAXLE SETTING STUD BOLT

(a) Type A:

(1) Using 2 nuts, remove the 2 transfer and transaxle setting stud bolts from the automatic transaxle assembly.

(b) Type B:

(1) Using 2 nuts, remove the 4 transfer and transaxle setting stud bolts from the automatic transaxle assembly.

33. INSPECT TORQUE CONVERTER ASSEMBLY

Click here

34. INSPECT DRIVE PLATE AND RING GEAR SUB-ASSEMBLY

Click here