Toyota automatic transmission shift mechanism
The Toyota automatic transmission shift mechanism usually consists of the following main components:
Gear selector
* Driver-controlled device that allows different gear positions to be selected.
* The selector usually has several positions, such as P (park), R (reverse), N (neutral), D (drive), etc.
Selector cable
* Flexible cable connecting the gear selector to the transmission.
* Transfer of selector movements to the transmission.
Transmission control unit (TCU)
* Electronic controller that receives signals from the gear selector and other sensors.
*Determines the desired gear position and transmits commands to transmission components.
Hydraulic unit
* A complex hydraulic device that controls the supply of fluid pressure to the friction and retaining packs.
* Switches gears by turning appropriate packages on and off.
Friction and holding packs
* Friction and steel plate sets that transfer power from the engine to the transmission.
*Actuated by the valve body to change gears.
Fluid pressure controller
* Component that regulates fluid pressure in the transmission.
* Optimizes fluid pressure to ensure smooth gear shifting.
Workflow
When the driver moves the gear selector, the signal is transmitted to the TCU through the selector cable. The TCU interprets the signal and issues commands to the valve body. The valve body then controls the friction and retaining packs to engage the required gear. The fluid pressure controller regulates fluid pressure to ensure smooth gear changes.
Depending on the vehicle model, there may be differences in the specific components and design of the shift mechanism.