Toyota four-speed automatic transmission

Transfers:

* 1st gear: Designed for steep grades and low-speed towing.
* 2nd gear: Used for acceleration from a standstill and at low speeds.
* 3rd gear: Transition gear to increase speed.
* 4th Gear: Highest gear to save fuel and reduce engine speed at cruising speeds.

Key Features:

* Torque Converter: Converts engine power and smoothly transfers it to the transmission.
* Planetary Gears: Used to select gears.
* Brake Bands: Holds planetary gears to ensure torque is transmitted to the wheels.
* Friction discs: Transmit torque between transmission shafts.
* Electronic control unit (ECU): Controls automatic gear shifting based on sensor readings.

Advantages:

* Convenience: Comfortable driving without having to change gears manually.
* Smooth: The torque converter ensures smooth gear shifting.
* Efficiency: The four-speed automatic transmission helps to save fuel thanks to the presence of an overdrive transmission (4th gear).
*Ease of Service: Toyota four-speed automatic transmissions are relatively easy to service compared to newer transmissions.

Toyota models with four-speed automatic transmission:

* Corolla (1988-2002)
* Camry (1987-2001)
* Celica (1985-2005)
* Supra (1986-1992)
*RAV4 (1995-2000)

Thanks for reading!