UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): DIFFERENTIAL OIL SEAL (for LH Side): REPLACEMENT; 2025 - 2026 MY Corolla Corolla Hatchback GR Corolla [09/2024

Last Modified: 08-23-2025	6.11:8.1.0	Doc ID: RM100000002OT87
Model Year Start: 2025	Model: GR Corolla	Prod Date Range: [09/2024 - ]
Title: UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): DIFFERENTIAL OIL SEAL (for LH Side): REPLACEMENT; 2025 - 2026 MY Corolla Corolla Hatchback GR Corolla [09/2024 - ]

REPLACEMENT

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during front drive shaft oil seal LH 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
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

PROCEDURE

1. REMOVE FRONT DRIVE SHAFT ASSEMBLY LH

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2. REMOVE FRONT DRIVE SHAFT OIL SEAL LH

(a) Using SST, remove the front drive shaft oil seal LH from the automatic transaxle case sub-assembly.

SST: 09308-00010

NOTICE:

Do not damage the automatic transaxle case sub-assembly.

3. INSTALL FRONT DRIVE SHAFT OIL SEAL LH

(a) Using SST and a hammer, install a new front drive shaft oil seal LH to the automatic transaxle case sub-assembly.

Depth

SST: 09316-10010

SST: 09950-70010

09951-07100

Standard Depth:

-0.5 to 0.5 mm (-0.0197 to 0.0197 in.)

NOTICE:

Be sure to install the front drive shaft oil seal LH in the correct direction.
Make sure to install the front drive shaft oil seal LH as specified, otherwise malfunctions such as a fluid leak will occur.
Do not damage the lip of the front drive shaft oil seal LH.

Make sure that the outer lip of the front drive shaft oil seal LH is not pinched by SST.

*a	Correct
*b	Incorrect
*c	Outer Lip

Do not allow foreign matter to attach to the inner lip and outer lip of the front drive shaft oil seal LH.
Do not install the front drive shaft oil seal LH at an angle.
Do not remove the grease from the inner lip and outer lip of the front drive shaft oil seal LH.

4. INSTALL FRONT DRIVE SHAFT ASSEMBLY LH

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