Reduction Gear (Single-speed Gearbox)
The reduction gear is a single-speed gearbox that lowers motor speed for the wheels.
What is Reduction Gear (Single-speed Gearbox)?
EVs usually need no multi-speed gearbox. It contains a differential. It uses its own oil. Electric motors spin much faster than wheels and deliver strong torque from zero speed, so one fixed ratio is usually enough. A few performance electric cars use a two-speed gearbox for better acceleration and top speed. Some manufacturers specify the oil as lifetime fill, others give a change interval.
How it works
Gears reduce speed and increase torque.
Why it matters for your car
Follow oil change intervals. Whining may indicate wear.
Other terms
- All-Terrain Tyre (A/T)
- Alloy Wheel Refurbishment
- Build Date (Production Date)
- Cylinder Head
- DC-DC Converter
- Dual Injection (Port And Direct)
- Fuel Cell Vehicle (Hydrogen Car)
- Grey Import (Parallel Import)
- Lane Keeping Assist
- Left-Hand Drive (LHD)
- Power Steering
- Rain Sensor
- Rear-facing Child Seat
- Rust Converter
- Short Circuit
- Side Impact Crash Test
- Two-Post Lift (Vehicle Lift)
- Tyre Age (DOT Date Code)
- Vehicle-to-grid (V2G, Bidirectional Charging)
- WLTP (Worldwide Harmonised Light Vehicles Test Procedure)