Details of the four-speed gearbox housing:
A - until August 1977.; B - since August 1977.
1 - gearbox housing; 2 - front cover of the gearbox, combined into one unit with the guide sleeve of the clutch release bearing; 3 - sealing ring; 4, 18 — oil seal; 5, 7, 16 - adjusting rings; 6, 9, 17 - ball bearings; 8 - plug; 10 — mounting sleeve; 11 - ventilation valve; 12 — inspection and filler plugs; 13 — lower clutch housing cover; 14 — rear cover of the gearbox; 15 - roller bearing; 19 — secondary shaft rear bearing cover; 20 — gear selection rod lock; 21 — drain plug; 22 — plug; 23 — bushing; 24 — Reverse light switch.