AW NORTH CAROLINA, INC.

Components

Torque Converter

Component Products

Components Info.

The AW North Carolina transmission parts are used more widely around the world.

 

Automatic Transmission Products

Role of the torque converter

  • Multiplies torque generated by the engine.
  • Serves as an automatic clutch which transmits engine torque to the transmission.
  • Absorbs torsional vibration of the engine and drivetrain.
  • Smoothes out engine rotation.
  • Drives the oil pump of the hydraulic control system.

Clutch Assemblies

Role of clutch assemblies

Clutches:

  • Holds two rotating components together so that they turn in the same direction at the same speed.

 

Brakes:

  • Hold planetary components to the transmission case so they cannot turn in either direction.
  • Can also be used to hold a one-way clutch race to provide an additional state of one-way clutch operation.

 

One-way Clutches:

  • Holds planetary components locked in one direction for allowing free rotation in the opposite direction.

Carrier

Role of the carrier

  • Carriers are made up of gears.
  • Gears create the different ratios that allow the vehicle to accelerate from a stop.
  • The low gears that allow the vehicle to get moving are called “Underdrive Ratios” and are greater than 1
  • Gears also improve fuel economy by turning the engine slower at high speeds.
  • The high gears that allow low RPMs on the highway are called “Overdrive Ratios” and are less than 1
  • Many different types of gears can be used, but most automatic transmissions use Planetary Gear sets.

Valve Body

Role of the valve body

  • The Valve body is the “Brain” of the A/T.
  • It signals gear changes by sending ATF to the various clutches and brakes.
  • It does this by changing the oil pressure in different circuits.

Oil Pump

Role of the oil pump

  • Provide fluid to lubricate the planetary gear set.
  • Provide continuous fluid to the torque converter
  • Provide a volume of fluid to the clutches and brakes.
  • Supply operating pressure to the hydraulic control system.
  • Provide support for the torque converter stater (stator reaction shaft) as well as the front planetary gear set.

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