An automatic transmission consists of three main components: a transformer, which is directly connected to the engine; a final drive mechanism that includes a differential assembly; planetary gearbox with hydraulically controlled multi-plate clutch and belt brake. The gearbox also has an oil pump, which is attached to the impeller of the transformer, this pump supplies transmission fluid to the planetary gears, hydraulic control and transformer. The fluid performs a triple function: lubricates rotating parts, cools the automatic transmission system, and provides a medium for torque transmission. The main gear is lubricated independently of the transmission lubrication system, unlike a manual transmission where the main gear is lubricated from a common system.
Transformer - a unit in a non-separable case, which cannot be disassembled. It is bolted to the crankshaft drive plate and replaces the clutch used on a manual transmission engine.
Planetary gearbox with epicyclic gear set, hydraulically controlled brakes and clutches. The desired gear is selected by a combination of three control signals: a manual valve actuated by the shift cable, a manual valve operated by the fuel control pedal, and a hydraulic pressure regulator. A shift cable and selector lever allows the driver to select a specific gear and adjust the automatic control if desired. The accelerator control determines the correct gear for a specific degree of acceleration, the governor determines the desired gear in relation to the engine speed.
Due to the need for special testing equipment, the complexity of some parts, and the need for absolute cleanliness when servicing automatic transmissions, the work that the owner can do on their own is limited.
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