Operation

Operation

The gearbox output shaft transmits power to the mainshaft input gear which is in constant mesh with one of the intermediate gears. The intermediate gears are in constant mesh with the high and low range output gears running on the differential rear shaft.

Power is transmitted to the output shafts by locking either the high or low range gears to the differential rear shaft. This is achieved by means of the high/low selector fork, sleeve and splined hub.

The differential lock, when applied, prevents all available power being transmitted to the road wheels offering least resistance and is especially useful for off-road conditions. When selected, the selector fork engages the dog clutch on the differential shaft with a gear on the front output shaft; this locks the differential and provides fixed drive thereby transmitting equal power to both output shafts.