4-speed gearbox device (Opel Kadett E)

Details of the 4-speed gearbox type "F10":
1 — primary shaft;
2 — primary shaft gear block;
3 — secondary shaft;
4 — fork for shifting 1st and 2nd gears;
5 — fork for shifting III and IV gears;
6 — driven gear of 1st gear;
7 — synchronizer of 1st and 2nd gears;
8 — 1st gear synchronizer locking ring;
9 — locking ring of the 2nd gear synchronizer;
10 — driven gear of the 2nd gear;
11 — driven gear of the 3rd gear;
12 — synchronizer of III and IV gears;
13 — III gear synchronizer locking ring;
14 — IV gear synchronizer locking ring;
15 — driven gear of the 4th gear;
16 — main gear drive pinion;
17 — intermediate reverse gear;
18 — reverse gear fork;
19 - ball bearings;
20 — roller bearing;
21 - needle bearing;
22 — gear shift fork locks;
23 — Reverse light switch;
24 — oil level control hole plug;
25 - gearbox housing;
26 — back cover;
27 — back cover plug;
ZX — reverse gear.