The input shaft of the gearbox is made in the form of a block of gears. The gears of the input shaft are driving, they are in constant engagement with the driven gears of the forward gears mounted on the secondary shaft. All elements of the secondary shaft are removable. The secondary shaft is hollow, with radial holes in the gears for lubrication of the outer surface of the shaft. The fifth gear rotates on a bushing. The final drive gear and synchronizer hubs are mounted on the splines of the shaft. The front ends of the shafts are supported by roller bearings, and the rear ends by ball bearings.
The differential is two-satellite, the preload of its bearings is regulated by the selection of the thickness of the adjusting ring installed under the outer ring of the differential bearing. A plastic drive gear for the speed sensor drive is installed on the differential housing. The driven gear and the sensor drive shaft are mounted on the crankcase.
To control the oil level in the gearbox housing, a level indicator is installed (measuring probe).
Transmission: 1 - rear cover of the gearbox housing; 2, 44 - nut; 3 - fifth gear drive gear; 4 - thrust plate; 5, 40 - bearing lock ring; 6 - ball bearing of the primary shaft; 7 - the drive gear of the fourth gear; 8 - gearbox housing; 9 - input shaft; 10 - third gear drive gear; 11 - second gear drive gear; 12 - reverse gear; 13 - drive gear of the first gear; 14 - roller bearing; 15 - breather; 16 - input shaft seal; 17 - clutch housing; 18 - roller bearing of the secondary shaft; 19 - oil collector; 20 - main gear drive gear; 21 - plastic drive gear of the speed sensor drive; 22, 32 - drive gland; 23, 30 - differential tapered roller bearing; 24 - speed sensor drive; 25 - differential box; 26 - differential satellite; 27 - axis of the satellites; 28 - side gear; 29 - driven gear of the main gear; 31 - adjusting ring; 33 - driven gear of the first gear; 34 - synchronizer of the first and second gears; 35 - driven gear of the second gear; 36 - driven gear of the third gear; 37 - synchronizer of the third and fourth gears; 38 - driven gear of the fourth gear; 39 - ball bearing of the secondary shaft; 41 - bushing; 42 - driven gear of the fifth gear; 43 - fifth gear synchronizer