Materials required to change automatic transmission oil in Toyota Corolla 121:
* New Toyota WS automatic transmission oil (approximately 4 liters)
* New automatic transmission filter
* Automatic transmission pan gasket
* Funnel for filling oil
* Oil drain tray
* Set of keys and screwdrivers
Replacement procedure:
1. Preparation:
* Park the car on a level surface and secure it with the parking brake.
* Let the engine idle for a few minutes to warm up the automatic transmission oil.
* Stop the engine.
2. Draining the automatic transmission oil:
* Remove the automatic transmission pan drain cover with a 19 mm wrench.
* Drain the old oil into a drain pan. Be careful, the oil may be hot.
3. Removing the automatic transmission pan:
* Unscrew the automatic transmission pan bolts with a 10 mm wrench.
* Carefully remove the tray.
4. Replacing the automatic transmission filter:
* Remove the old automatic transmission filter from the pan.
* Install the new filter into the pan.
5. Cleaning the tray and magnets:
* Clean the automatic transmission pan from dirt and metal shavings.
* Clean the magnets on the tray from metal shavings.
6. Installing the gasket and automatic transmission pan:
* Install a new gasket under the automatic transmission pan.
* Reinstall the pan and tighten the bolts to a torque of 7 Nm.
7. Filling with new automatic transmission oil:
* Insert a funnel into the hole of the automatic transmission dipstick.
* Pour new automatic transmission oil into the gearbox until it begins to flow out of the hole.
* Reinstall the automatic transmission dipstick.
8. Checking the automatic transmission oil level:
* Start the engine and let it idle for a few minutes.
* Shift the automatic transmission selector lever to all positions, holding each position for a few seconds.
* Check the automatic transmission oil level using the dipstick. The level should be between the “HOT” and “COLD” marks.
*Add or drain oil as needed.
9. Completion:
* Make sure all bolts and plugs are properly tightened.
* Reset the automatic transmission oil aging counter if applicable to your model.
* Check the automatic transmission pan for leaks.
Notes:
* It is recommended to change the automatic transmission oil every 40,000 – 60,000 km or more often if the car is operated in difficult conditions.
* Always use Toyota WS automatic transmission oil recommended for your model.
*If you are unsure of your ability to change the automatic transmission oil yourself, consult a qualified mechanic.