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Third Gear (See Third Gear Figure)

To go from second to third gear, the shift lever is returned to neutral to disengage the first/second sleeve from second gear. It is then moved to third position. The third/fourth sleeve engages the third gear.

Fourth Gear (See Fourth Gear Figure)

When the shift lever is placed in fourth position, the third/f ourth sleeve is disengaged from third gear, then engaged with the crown teeth on the input shaft. As a result, there is a direct drive from the input shaft to the main shaft, giving a 1 : 1 ratio. The countershaft continues to be driven, but does not transfer power.