Power Flow
The torque of the engine is transferred from the clutch to the input shaft and then onwards via different gear sets and driving final drives, depending on the gear selected, to the final drive/differential, drive shafts and out to the front wheels.
1st gear
| Number | Designation | Number | Designation |
|---|---|---|---|
| B | Lower output (secondary) shaft | 5 | 1st speed gear |
| 1 | Input shaft | 11 | 1st gear idler wheel /back-up (reverse) intermediate gear |
| 2 | Final drive | 12 | Coupling sleeve for 1st and 2nd gear |
| 4 | Driving final drive |
When 1st gear is selected, the coupling sleeve for 1st-2nd gear is moved by a gear selector fork along the synchronizing hub towards the idler wheel for 1st gear. The coupling sleeve and synchronizing hub lock the idler wheel for 1st gear at the lower output (secondary) shaft.
The engine torque is transferred from the clutch to the input shaft to the gear and idler wheel for 1st gear, through the lower output (secondary) shaft and on to the final drive gear and out to the final drive.
2nd gear
| Number | Designation | Number | Designation |
|---|---|---|---|
| B | Lower output (secondary) shaft | 6 | 2nd speed gear |
| 1 | Input shaft | 12 | Coupling sleeve for 1st and 2nd gear |
| 2 | Final drive | 13 | 2nd gear idler wheel |
| 4 | Driving final drive |
When 2nd gear is selected, the coupling sleeve for 1st-2nd gear is moved by a gear selector fork along the synchronizing hub towards the idler wheel for 2nd gear. The coupling sleeve and synchronizing hub lock the idler wheel for 2nd gear at the lower output (secondary) shaft.
The engine torque is transferred from the clutch to the input shaft to the gear and idler wheel for 2nd gear, through the lower output (secondary) shaft and on to the final drive gear and out to the final drive.
3rd gear
| Number | Designation | Number | Designation |
|---|---|---|---|
| A | Primary shaft | 4 | Driving final drive |
| B | Lower output (secondary) shaft | 9 | Coupling sleeve for 3rd and 4th gear |
| 1 | Input shaft | 10 | 3rd gear idler wheel |
| 2 | Final drive | 15 | 3rd speed gear |
When 3rd gear is selected, the coupling sleeve for 3rd/4th gear is moved by a gear selector fork along the synchronizing hub towards the idler wheel for 3rd gear. The coupling sleeve and synchronizing hub lock the idler wheel for 3rd gear at the primary shaft.
The engine torque is transferred from the clutch to the input shaft, to the idler wheel for 3rd gear. It is then transferred to the gear for 3rd gear on the lower output (secondary) shaft, and on to the final drive gear and out to the final drive.
4th gear
| Number | Designation | Number | Designation |
|---|---|---|---|
| A | Primary shaft | 4 | Driving final drive |
| B | Lower output (secondary) shaft | 8 | 4th gear idler wheel |
| 1 | Input shaft | 9 | Coupling sleeve for 3rd and 4th gear |
| 2 | Final drive | 14 | 4th speed gear |
When 4th gear is selected, the coupling sleeve for 3rd/4th gear is moved by a gear selector fork along the synchronizing hub towards the idler wheel for 4th gear. The coupling sleeve and synchronizing hub lock the idler wheel for 4th gear at the primary shaft.
The engine torque is transferred from the clutch to the input shaft, to the idler wheel for 4th gear. It is then transferred to the gear for 4th gear on the lower output (secondary) shaft, and on to the final drive gear and out to the final drive.
5th gear
| Number | Designation | Number | Designation |
|---|---|---|---|
| A | Primary shaft | 7 | 5th speed gear |
| C | Upper output (secondary) shaft | 17 | Coupling sleeve for 5th/back-up (reverse) gear |
| 2 | Final drive | 18 | 5th gear idler wheel |
| 3 | Driving final drive |
When 5th gear is selected, the coupling sleeve for 5th/back-up (reverse) gear is moved by a gear selector fork along the synchronizing hub towards the idler wheel for 5th gear. The coupling sleeve and synchronizing hub lock the idler wheel for 5th gear at the upper output (secondary) shaft.
The engine torque is transferred from the clutch to the input shaft, to the gear on the primary shaft for the idler wheel for 5th gear on the upper output (secondary) shaft, and on to the final drive gear and out to the final drive.
Back-up (reverse) gear
| Number | Designation | Number | Designation |
|---|---|---|---|
| B | Lower output (secondary) shaft | 9 | Coupling sleeve for 3rd and 4th gear |
| C | Upper output (secondary) shaft | 11 | 1st gear idler wheel /back-up (reverse) intermediate gear |
| 1 | Input shaft | 16 | Idler wheel for back-up (reverse) gear |
| 2 | Final drive | 17 | Coupling sleeve for 5th/back-up (reverse) gear |
| 3 | Driving final drive | 20 | Synchronizing relay |
| 5 | 1st speed gear |
When back-up (reverse) gear is selected, the coupling sleeve for 5th/back-up (reverse) gear is moved by a gear selector fork along the synchronizing hub towards the idler wheel for back-up (reverse). The coupling sleeve and synchronizing hub then lock the idler wheel for back-up (reverse) at the upper output (secondary) shaft.
The engine torque is transferred from the clutch to the input shaft, to the gear on the primary shaft for the idler wheel for 1st gear (which also acts as intermediate gear for back-up (reverse) gear) on the lower output (secondary) shaft. It is then transferred to the idler wheel for back-up (reverse) gear on the upper output (secondary) shaft, and on to the final drive gear and out to the final drive.
Because the idler wheel for 1st gear is used as the intermediate gear for back-up (reverse) gear, there is no separate shaft for back-up (reverse) gear.