Opel Omega A gearbox
Gearbox type
The Omega A was equipped with a GM Type 125 3-speed automatic transmission.
Components:
* Torque converter
* Planetary gear with three gear ratios (neutral, low, direct gear)
* Hydraulic control unit
* Engine speed and road sensors
Operating principle
1. Torque converter:
* The torque converter transmits torque from the engine to the gearbox.
* It consists of a pump, turbine and stator.
* The pump is rotated by the engine and circulates transmission fluid.
* The turbine is rotated by transmission fluid and connected to the transmission input shaft.
* The stator directs the circulating fluid, causing the turbine to spin at higher speeds, which creates more torque.
2. Planetary gear:
*Planetary gear includes sun, planetary and ring gears.
*By shifting these gears, the gearbox selects the gear ratio.
* Gear ratio determines the relationship between engine speed and vehicle speed.
3. Hydraulic control unit:
* The hydraulic control unit receives signals from sensors and transmission fluid pressure.
* It uses this information to control the flow of transmission fluid through the planetary gear.
* This allows you to select and change gears at the right time.
Transfers:
*P (Park): Locks the transmission output shaft.
* R (Reverse): Engages reverse gear.
* N (neutral): Turns off all gears.
* D (Direct): Selects direct (1:1) gear for normal driving.
* 2: Selects second gear (fixed ratio) for low speed driving or hill climbing.
*1: Selects first gear (fixed ratio) for very low speed driving or towing.