Shaft details of 4-speed gearbox type "F": 1 - primary shaft; 2 - secondary shaft; 3 - reverse intermediate gear axis; 4 - front bearing of the primary shaft; 5 - rear bearing of the primary shaft; 6 - front bearing of the secondary shaft; 7 - secondary shaft rear bearing; 8 - bushing; 9 - hub of the sliding clutch of the synchronizer of the 1st and 2nd gears; 10 - sliding clutch of synchronizer of 1st and 2nd gears with reverse gear ring gear; 11 - synchronizer springs for 1st and 2nd gears; 12, 13 - synchronizer locking rings; 14 - synchronizer springs for III and IV gears; 15 - sliding clutch of synchronizer III and IV gears; 16 - hub of sliding clutch of synchronizer of III and IV gears; 17 - retaining ring of the hub of the sliding clutch of the synchronizer of III and IV gears; 18 - thrust half rings of the 2nd gear; 19 - ring; 20 - oil seal.