Power Flow

POWER FLOW

Neutral: In neutral, with engine running and clutch engaged, the input shaft will turn. With the 1st/2nd, 3rd/4th, and 5th synchronizers in a neutral position, power will not flow to the output shaft.

1st Gear: In 1st gear range, the 3rd/4th and 5th synchronizers are in neutral and the 1st/2nd synchronizer sleeve is moved to the right to engage the 1st speed blocker ring and the 1st gear. Because the 1st/2nd synchronizer hub is splined to the output shaft, torque is transmitted from the input gear through 1st speed gear, the synchronizer sleeve and hub, the output shaft, and into the differential (final drive) assembly.

2nd Gear: In 2nd gear range, the 3rd/4th and 5th synchronizers are in neutral and the 1st/2nd synchronizer sleeve is moved to the left to engage the 2nd speed blocker ring and the 2nd speed gear. With the 1st/2nd synchronizer hub splined to the output shaft, torque is transmitted from the input shaft through 2nd speed gear, the synchronizer sleeve and hub, the output shaft, and into the differential (final drive) assembly.

3rd Gear: In the 3rd gear range, the 1st/2nd and 5th synchronizer sleeves are in a neutral position, and the 3rd/4th synchronizer sleeve is moved to the right to engage the 3rd speed blocker ring and the 3rd speed gear. With the 3rd/4th synchronizer hub splined to the input shaft, torque is transmitted from the input shaft through the synchronizer hub and sleeve, the 3rd speed gear, the output shaft, and into the differential (final drive) assembly.

4th Gear: In 4th gear range, the 1st/2nd and 5th synchronizers are in neutral and the 3rd/4th synchronizer sleeve is moved to the left to engage the 4th speed blocker ring and the 4th speed gear. With the 3rd/4th synchronizer hub splined to the input shaft, torque is transmitted from the input shaft through the synchronizer hub and sleeve, the 4th speed gear, the output shaft, and into the differential (final drive) assembly.

5th Gear: In 5th gear (overdrive) range, the 1st/2nd and 3rd/4th synchronizers are in a neutral position and the 5th speed synchronizer sleeve is moved to the right to engage the blocker ring and the 5th speed gear. With the 5th speed synchronizer hub splined to the input shaft, torque is transmitted from the input shaft through the synchronizer hub and sleeve' the 5th speed gear, the output shaft, and into the differential (final drive) assembly. The unit is now in overdrive.

Reverse: In reverse gear range, all synchronizers are in the neutral position. The reverse idler gear is moved to engage the drive gear on the input shaft and the external teeth on the 1st/2nd synchronizer sleeve. Torque is now transmitted from the input shaft through the reverse idler gear, 1 et/2nd synchronizer sleeve and hub, the output shaft, and into the differential (final drive) assembly.

To ease reverse engagement, the 5th/Reverse brake synchronizer is instantaneously engaged before the reverse shift is completed to decelerate the rotational speed of the input shaft.