Automatic Transmission Repair

The modern automatic transmission consists of many components and systems that are designed to work together.

The main components that make up an automatic transmission include:

• Planetary Gear Sets which are the mechanical systems that provide the various forward gear ratios as well as reverse.

• The Hydraulic System which uses a special transmission fluid sent under pressure by an Oil Pump through the Valve Body to control the Clutches and the Bands in order to control the planetary gear sets.

• Seals and Gaskets are used to keep the oil where it is supposed to be and prevent it from leaking out.

• The Torque Converter which acts like a clutch to allow the vehicle to come to a stop in gear while the engine is still running.

• The Governor and the Modulator or Throttle Cable that monitor speed and throttle position in order to determine when to shift.

• On newer vehicles, shift points are controlled by Computer which directs electrical solenoids to shift oil flow to the appropriate component at the right moment..


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