Powerflow

Powerflow in Neutral

• The input gear drives the countershaft.
• The countershaft gears drive the 1st, 2nd and 3rd gears on the output shaft.
• All synchronizers are centered (disengaged).
• No gears are engaged to the output shaft.
• The output shaft is not engaged to the input shaft.

Powerflow in 1st Gear

• The input gear drives the countershaft.
• The countershaft gear drive the 1st, 2nd and 3rd gears on the output shaft.
• The 1-2 synchronizer hub is splined to the output shaft.
• When the synchronizer sleeve is shifted rearward, the 1st gear is engaged to the output shaft through the synchronizer hub.
• The output shaft rotates once for every 5.08 CR or 5.72 WR rotations of the crankshaft.

Powerflow in 2nd Gear

• The input gear drives the countershaft.
• The countershaft gears drive the 1st, 2nd and 3rd gears on the output shaft.
• The 1-2 synchronizer hub is splined to the output shaft.
• When the synchronizer sleeve is shifted forward, the 2nd gear is engaged to the output shaft through the synchronizer hub.
• The output shaft rotates once for every 2.60 CR or 2.94 WR rotations of the crankshaft.

Powerflow in 3rd Gear

• The input gear drives the countershaft.
• The countershaft gears drive the 1st, 2nd and 3rd gears on the output shaft.
• The 3-4 synchronizer hub is splined to the output shaft.
• When the synchronizer sleeve is shifted rearward, the 3rd gear is engaged to the output shaft through the synchronizer hub.
• The output shaft rotates once for every 1.53 CR or 1.61 WR rotations of the crankshaft.

Powerflow in 4th Gear

• The input gear drives the countershaft.
• The countershaft gears drive the 1st, 2nd and 3rd gears on the output shaft.
• The 3-4 synchronizer hub is splined to the output shaft, but no gears are engaged to the output shaft.
• When the synchronzier sleeve is shifted forward, the input shaft is locked to the output shaft through the synchronizer hub.
• The output shaft rotates once for every rotation of the crankshaft.

Powerflow in 5th Gear

• The input gear drives the countershaft.
• The countershaft gears drive the 1st, 2nd and 3rd gears on the output shaft, and the 5th gear synchronizer.
• The 5th gear synchronizer is splined to the countershaft.
• When the synchronizer sleeve is shifted forward, the 5th gear is engaged to the countershaft.
• The countershaft 5th gear drives the output shaft 5th gear.
• The output shaft is driven in overdrive. Less than one 0.77 CR or 0.76 WR rotation of the crankshaft is needed for each rotation of the output shaft.

Powerflow in Reverse Gear

• The input gear drives the countershaft.
• The countershaft drives the reverse idler gear, after the idler is slid into engagement.
• The reverse idler gear drives the teeth cut along the outside of the 1-2 synchronizer sleeve (which is splined to the output shaft through the hub), which reverses the rotation of the output shaft and drives it in reduction.