The axle supports the wheels. Therefore, the axle varies in design according to the type of suspension and power train (FF, FR, 4WD, etc.). The axle shaft supports the wheel and transmits the drive torque Read more What is an Automotive Axle?
What is a Valve Body?
The valve body consists of an upper valve body, and a lower valve body. The valve body resembles a labyrinth, containing many passages through which the transaxle fluid flows. Many valves are built into Read more What is a Valve Body?
What is an Automotive Limited Slip Differential ?
The LSD is a mechanism that limits the differential when one of the wheels begins to slip and generates an appropriate drive force in the other wheel to allow the vehicle to drive smoothly. There are various Read more What is an Automotive Limited Slip Differential ?
Major Components of Oil Pump
The oil pump is driven by the torque converter (engine) to supply the hydraulic pressure that is required for the operation of the automatic transaxle.
HINT:
Use the dipstick for fluid level inspection, Read more Major Components of Oil Pump
Hydraulic Control Unit
The clutches and brakes that operate the planetary gear unit are operated by hydraulic pressure. The hydraulic control unit generates and adjusts this hydraulic pressure and switches its passage. The illustration Read more Hydraulic Control Unit
Types of Planetary Gear Unit
There are various types of planetary gear units. Here, typical planetary gear units are:
1. 3-speed + O/D type (FF vehicles)
By combining a 3-speed planetary gear unit with an O/D gear unit, four Read more Types of Planetary Gear Unit
What is Overdrive Gear Unit?
The overdrive gear unit is an independent planetary gear unit with a gear ratio less than 1.0 (approx. 0.7-0.8). It is combined with a conventional 3-speed planetary gear unit and is equivalent to the Read more What is Overdrive Gear Unit?
Power Transmission and Manual Transmission Path
Manual transaxles are located at the left end or right end of transversely mounted engines in FF vehicles. Manual transmissions are located to the rear of vertically mounted engines in FR vehicles.
Operations of Planetary Gear Unit
1. 1st gear
(1) The input shaft turns the front planetaryring gear clockwise by C1.
(2) The front planetary pinion gear turns and revolves and makes the sun gear turn counterclockwise.
(3) In the rear Read more Operations of Planetary Gear Unit
What is an Automotive Manual Transaxle drive train?
The drive train transmits the power of the engine to the wheels. It is broadly divided into the following classifications:
1. FF (Front engine-Front wheel drive vehicle)
The drive force from the Read more What is an Automotive Manual Transaxle drive train?