Detailed description FA 57: Mechanical: Notes
The mechanical systems comprise:
- Gearcase,
- Torque converter shell with torque converter
- Oil pump
- Valve housing
- Four planetary gears
- Three clutches
- Five brakes
- Differential
- Gear for transmission between input and output shafts
- Bearings of axial and radial type
- Two one-way drives (freewheel)
In order to generate different gear ratios, planetary gear components such as the sun gear, planet gear, ring gear and planet carrier are locked or released. All friction elements for this are disc-type except for brake B4, which is band-type. Because there are four different planetary gears, many different gear ratios are possible. See PLANETARY GEAR, DESCRIPTION, ANIMATION .