Automatic transmission with two-position switches
This is a type of automatic transmission that uses two switches to select gear:
*High Range (H): Engages higher ratio gears (1st, 2nd, 3rd, 4th).
*Low Range (L): Engages lower ratio gears (1st, 2nd gear, rarely 3rd gear).
How does this work
* In position H, all gears (1st, 2nd, 3rd, 4th) are available for automatic shifting.
*In position L, the transmission will only use lower ratio gears (usually 1st and 2nd). This is useful for increasing traction or for slowing down on steep slopes.
Restrictions
Shift-shift transmissions have some limitations compared to more modern automatic transmissions:
* Limited gear range: They do not have as wide a gear range as other types of automatic transmissions, which can limit performance and fuel efficiency.
*No manual mode: They lack the ability to manually shift gears, which can limit driving flexibility.
*Reduced Fuel Efficiency: Because they operate in a narrower gear range, they typically have lower fuel efficiency than wider range transmissions.
Application
Transmissions with two-position shifters are most often found in inexpensive cars and commercial vehicles, such as:
* Economical cars
* Compact SUVs
* Light trucks
* Vehicles for transporting people
They are suitable for vehicles that require a simple and reliable automatic transmission with a limited gear range.