The primary shaft of the gearbox is made in the form of a block of gears. The primary shaft gears are driving gears and 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 places where the gears are installed for lubrication of the outer surface of the shaft. The fifth gear pinion rotates on the sleeve. The main gear drive pinion and synchronizer hubs are mounted on the shaft splines. The front ends of the shafts are supported by roller bearings, and the rear ends by ball bearings.
The differential is a two-satellite one, the preload of its bearings is adjusted by selecting the thickness of the adjusting ring installed under the outer ring of the differential bearing. A vehicle speed sensor setting ring is installed on the differential housing. The sensor is installed on the gearbox housing.
To control the oil level in the gearbox housing, a level indicator is installed (measuring probe).
The gear shift mechanism is equipped with an electrically driven device that prevents the transmission from erroneously engaging reverse gear instead of first gear. The actuator of this device is a solenoid.
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It is installed at the bottom of the gearbox housing, on the left.
The reverse gear lock switch is located on the gear shift lever, under the handle.
Transmission:
1 - rear cover of the gearbox housing;
2, 44 - nut;
3 - fifth gear leading pinion;
4 - thrust plate;
5, 40 - bearing retaining rings;
6 - primary shaft ball bearing;
7 - fourth gear leading pinion;
8 - gearbox housing;
9 - primary shaft;
10 - third gear leading pinion;
11 - second gear leading pinion;
12 - reverse gear;
13 - first gear drive pinion;
14 - roller bearing;
15 - breather;
16 - primary shaft seal;
17 - clutch housing;
18 - secondary shaft roller bearing;
19 - oil collector;
20 - main gear drive pinion;
21 - Vehicle speed sensor ring;
22, 32 - drive seals;
23, 30 - tapered roller bearings of the differential;
24 - vehicle speed sensor;
25 - differential box;
26 - differential satellite;
27 - satellite axis;
28 - axle gear;
29 - driven gear of the main transmission;
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 third and fourth gears;
38 - driven gear of the fourth gear;
39 - secondary shaft ball bearing;
41 - bushing;
42 - driven gear of fifth gear;
43 - fifth gear synchronizer.
[Article copied from a web page ladaman]