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Transmission Repair |
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Automatic Transmission |
Chevrolet Transmission |
Dodge Transmission |
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An automatic transmission (also known as "AT" or "Auto") is an automobile gearbox
that can change gear ratios automatically as the vehicle moves, freeing the driver
from having to shift gears manually. Similar but larger devices are also used
for heavy-duty commercial and industrial vehicles and equipment. Most automatic transmissions have a set of possible gear ranges, often with a parking pawl feature that locks the output shaft of the transmission. Continuously variable transmissions (CVTs) can change the ratios over a range rather than between a set of gear ratios. CVTs have been used for decades in two-wheeled scooters but have only seen use in a few automobile models. Recently, however, CVT technology has gained greater acceptance among manufacturers and customers, especially in Nissan automobiles and gas-electric hybrid vehicles. Some machines with limited speed ranges or fixed engine speeds, such as some forklift trucks and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels. |
A manual transmission, or manual gearbox (also informally known as a 'manual', 'stick
shift', 'straight shift', or 'standard shift' is a type of transmission used
in motor vehicle applications. It generally uses a driver-operated clutch, typically
operated by a pedal or lever, for regulating torque transfer from the
internal combustion engine to the transmission, and a gear-shift, either operated
by hand (as in a car) or by foot (as on a motorcycle). Other types of transmission
in mainstream automotive use are the automatic transmission, semi-automatic
transmission, and the continuously variable transmission (CVT). From Wikipedia, the free encyclopedia |
Repair Choices • 3 Choices for Fixing your Transmission- |
• Repairing the Transmission • Install a Rebuilt or Re-Manufactured Transmission • Install a Salvage (used) Transmission. |
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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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Automatic |