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.
Role of clutch assemblies
- Holds two rotating components together so that they turn in the same direction at the same speed.
- 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.
- Holds planetary components locked in one direction for allowing free rotation in the opposite direction.
- 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.
- 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.
- 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.