The optional torque lock-up 5-speed transmission means the JCB 427 can achieve 100% efficiency through the transmission in 2nd to 5th gears for improved performance and fuel consumption. Closer gear ratios mean lower engine speeds in each gear. The JCB 427's Automatic Idle feature returns the engine to 700rpm after 30 seconds of inactivity, while Eco mode limits engine speed to 1,800rpm for reduced fuel consumption. Either way, productivity remains formidable. Wheel speed braking means the 427's brakes rotate at the same speed as the wheels for heat and drag reduction, as well as improved fuel economy. The JCB 427's hydraulic cooling fan automatically reacts to ambient temperature and adjusts the fan speed to optimize cooling, reduce fuel consumption and lower noise levels. Unloaded spool valves in the valve block means that arms lower under gravitational, not hydraulic force, reducing fuel consumption.