Gearbox shift range is defined as which percent interval?

Gearbox shift range is defined as which percent interval?

• A. 60-70%
• B. 65-75%
• C. 70-80%
• D. 75-85%

Answer: (B)

The gearbox shift range is the window of engine speed, expressed as a percentage of the maximum engine RPM, where the transmission shifts gears. This window is typically a 10% band, designed to keep shifts in a balanced range that trades off torque availability and engine efficiency. A shift window of 65–75% centers around 70% of max RPM, which places the engine in a solid torque region before shifting while avoiding running the engine too high after the shift. Shifting earlier tends to cause lugging, while shifting later can raise engine speeds unnecessarily and waste fuel or increase wear. So, 65–75% provides a smooth, efficient middle ground for most setups.

The gearbox shift range is the window of engine speed, expressed as a percentage of the maximum engine RPM, where the transmission shifts gears. This window is typically a 10% band, designed to keep shifts in a balanced range that trades off torque availability and engine efficiency. A shift window of 65–75% centers around 70% of max RPM, which places the engine in a solid torque region before shifting while avoiding running the engine too high after the shift. Shifting earlier tends to cause lugging, while shifting later can raise engine speeds unnecessarily and waste fuel or increase wear. So, 65–75% provides a smooth, efficient middle ground for most setups.