Stages of overhaul of Toyota automatic transmission:
1. Diagnostics
* Reading and analysis of fault codes.
* Visual inspection of the gearbox.
* Test drive to determine symptoms.
2. Removing the gearbox
* Disconnecting the gearbox from the engine and transmission.
* Removing the gearbox from the car.
3. Disassembly and troubleshooting
* Disassembling the gearbox into individual components.
* Clean and inspect parts for wear or damage.
* Identifying faulty components.
4. Replacing parts
* Replacement of faulty parts such as friction discs, steel discs, solenoids and bearings.
* Cleaning and restoration of other parts if necessary.
5. Gearbox assembly
* Assembling the gearbox in the reverse order of disassembly.
* Installation of new seals and gaskets.
* Correct clearance setting and adjustment.
6. Gearbox installation
* Installing the gearbox in the car.
* Connection to engine and transmission.
* Check the fluid level in the gearbox and top up as necessary.
7. Programming and calibration
* Programming of new electronic components (if necessary).
* Gearbox calibration for optimal performance.
8. Test drive and inspection
* Test drive to check the operation of the gearbox.
* Elimination of detected problems.
Recommended timing for overhaul of Toyota automatic transmission:
* About 200,000 – 250,000 kilometers for normal use.
* More often under severe operating conditions (towing, off-road driving).
Note:
*Actual overhaul times may vary depending on transmission model and operating conditions.
* Regular transmission fluid maintenance and replacement can significantly extend the life of the transmission and delay the need for major repairs.