Power Flow
MODEL S5-47 ZF TRANSMISSIONPowerflow 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 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 rearward, the 1st gear is engaged to the output shaft through the synchronizer hub.
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.
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.
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 synchronizer sleeve is shifted forward, the input shaft is locked to the output shaft through the synchronizer hub.
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.
Powerflow in Reverse Gear
^ The input gear drives the countershaft.
^ The countershaft gears drive 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.