Both 1st and 2nd gear as well as 3rd and 4th gear are triple synchronised.
5th, 6th and reverse gear have double synchronisation.
8
Input shaft ball bearing
The gear wheels for 1st and 2nd gear are an integral part of the input shaft. The gearwheels for 3rd and 5th gears and the gearwheel for 4th/6th gear are pressed on.
Because of the high force used to press on the components, the gear wheels cannot be pressed off in service. A faulty input shaft can only be replaced as a complete unit.
Defective bearings can be pressed off and changed.
Output shaft 1st/4th gear
1
Clutch housing taper roller bearing
2
1st/4th gear output shaft toothing
3
1st gear wheel and reverse gear idler gear
4
1st/2nd gear sliding collar
5
1st/2nd gear synchroniser hub
8
3rd/4th gear synchroniser hub
9
3rd/4th gear sliding collar
11
1st/2nd gear synchronizer
13
3rd/4th gear synchronizer
15
Transmission housing taper roller bearing
16
Bearing retaining bolt (left-hand thread)
The output pinion of the 1st/4th gear output shaft is an integral part of the shaft.
The synchroniser assemblies of the 1st/2nd and the 3rd/4th gears are located on the output shaft.
The 1st to 4th gear output shaft is a hollow shaft; the oil is supplied to the internal oilways via oil funnels.
Internal oilways provide lubrication to the needle roller bearings and the synchroniser assemblies.
Output shaft 5th/6th/reverse gear
1
Clutch housing taper roller bearing
2
5th/6th/reverse gear output shaft toothing
4
Reverse gear sliding sleeve
5
Reverse gear synchroniser hub
7
5th/6th gear synchroniser hub
8
Reverse gear synchronizer
11
5th/6th gear sliding collar
12
5th/6th gear synchronizer
14
Taper roller bearing, transmission housing
15
Bearing retaining bolt (left-hand thread)
The output pinion is an integral part of the shaft.
The 5th/6th and reverse gear synchronizer assemblies are located on the shaft.
The 5th/6th/reverse gear output shaft is a hollow shaft; the oil is supplied to the internal oilways via oil funnels.
Internal oilways provide lubrication to the needle roller bearings and the synchroniser assemblies.
Differential
1
Clutch housing taper roller bearing
5
Transmission housing taper roller bearing
All driving gear wheels of the transmission are located on the input shaft.
The input shaft is designed as a solid shaft and runs on one ball bearing and one roller bearing with no pre-load.
The two output shafts and the differential both run on taper roller bearings; this means a bearing pre-load is necessary.
Please refer to the service literature for further information on how to measure the pre-loads.
