The gearbox housing consists of four parts: the front cover, the main housing, the intermediate plate and the additional rear housing.
The 1/2 and 3/4 gear engagement forks are located in the main housing, and the 5th gear and reverse gear engagement forks are located in the rear housing.
All gears rotate on needle bearings. The gearbox shafts are mounted on tapered roller bearings. The axial play of the secondary and intermediate shaft bearings is adjusted by selecting washers located in the intermediate plate.
The gears are lubricated by a built-in low-pressure oil pump; oil is supplied to the gearbox components through openings in the secondary shaft. The gearbox has a ventilation hole and a ventilation tube that runs into the engine compartment.
1 - 1st gear pinion of secondary shaft, 2 - 2nd gear pinion of secondary shaft, 3 - 3rd gear pinion of secondary shaft, 4 - primary shaft and 4th gear pinion, 5 - 5th gear pinion of secondary shaft, 6 - intermediate shaft, 7 - secondary shaft, 8 - oil pump, 9 - mesh filter, 10 - ventilation tube, 11 - gear shift crossmember, 12 - 1/2 gear synchronizer, 13 - oil seals, 14 - 3/4 gear synchronizer, 15 - 5th gear synchronizer, 16 - adjusting washers of axial play of secondary and intermediate shafts, 17 - adjusting washer of 5th gear and reverse.
Gearbox components - gears and shafts. 1 - 3/4 gear engagement fork, 2 - locking sleeve, 3 - 1/2 gear engagement fork, 4 - fingers, 5 - rod, 6 - 5/reverse gear engagement fork, 7 - rod driver - type A gearbox, 8 - rod driver - type B/D gearbox, 9 - rod driver - type C gearbox, 10 - front bearing of the input shaft, 11 - input shaft, 12 - 4th gear synchronizer ring, 13 - spacer, 14 - 3/4 gear synchronizer sleeve, 15 - secondary shaft support bearing, 16 - 3/4 gear synchronizer rings, 17 - third gear pinion, 18 - needle bearing, 19 - secondary shaft, 20 - shift, 21 - needle bearing, 22 - second gear transmission, 23 - 2nd gear synchronizer rings, 24 - 1/2 gear synchronizer sleeve, 25 - 1st gear synchronizer rings, 26 - 1st gear pinion, 27 - needle bearing, 28 - bushing, 29 - secondary shaft roller bearing, 30 - adjusting washers, 31 - adjusting washer, 32 - bushing, 33 - needle bearing, 34 - reverse gear pinion, 35 - reverse synchronizer ring, 36 - reverse/5th gear synchronizer sleeve, 37 - retaining ring, 38 - needle bearing, 39 - fifth gear synchronizer ring, 40 - fifth gear pinion, 41 - fifth gear pinion segments, 42 - segment retaining ring, 43 - secondary shaft bearing, 44 - intermediate shaft bearing, 45 - intermediate shaft, 46 - intermediate shaft bearing, 47 - adjusting washers, 48 - intermediate shaft reverse gear pinion, 49 - intermediate shaft fifth gear pinion, 50 - split washer - on later models of the gearbox, 51 - fifth gear pinion lock nut, 52 - rear intermediate shaft bearing, 53 - washer, 54 - reverse idler gear, 55 - needle bearing, 56 - reverse idler gear shaft.
Gearbox housing. 1 - Front cover, 2 - Input shaft oil seal, 3 - Filler/inspection plug, 4 - Washer, 5 - Drain plug, 6 - Main case, 7 - Locking sleeve holder, 8 - Intermediate plate, 9 - Dowel pins, 10 - Locking plug, ball and spring, 11 - Oil deflector, 12 - Rear case - Type A and B gearboxes, 13 - Lever guide, 14 - Locking sleeve holder - Rear case, 15 - Reverse gear lock pawl spring, 16 - Reverse gear lock pawl, 17 - Pawl shaft, 18 - Oil seal bushing, 19 - Oil seal, 20 - Oil pump, 21 - O-ring, 22 - Reverse light switch, 23 - Cooling system bypass valve oil, 24 - bolt, 25 - sealing ring, 26 - lubrication system tube, 27 - mesh filter, 28 - ring, 29 - oil cooling system adapter, 30 - bolt, 31 - sealing ring, 32 - rear case - type C gearbox, 33 - lever guide - type C gearbox, 34 - reverse gear lock pawl lock plate, 35 - locking sleeve holder - type C gearbox, 36 - rod seal - type C gearbox, 37 - spacer - type C gearbox, 38 - speedometer drive pinion - type C gearbox, 39 - seal - type C gearbox, 40 - secondary shaft flange - type C gearbox, 41 - sealing ring - type C gearbox, 42 - spacer - type C gearbox, 43 - lock washer - type C gearbox, 44 - central drive flange bolt - type C gearbox, 45 - propeller shaft bolt - type C gearbox, 46 - bracket - type C gearbox, 47 - bracket bolt - type C gearbox, 48 - rear housing - type D gearbox, 49 - oil seal - type D gearbox.
The material was taken from the specified website (lrman.ru)
The gear shift mechanism is a type A gearbox. 1 - gear shift mechanism housing, 2 - gasket, 3 - nylon pin, 4 - damper spring, 5 - lever fixing bolt, 6 - housing fastening bolts, 7 - lower part of gear shift lever, 8 - spring and locking pin, 9 - upper part of gear shift lever, 10 - rod housing, 11 - plug, 12 - rod, 13 - sealing ring, 14 - journal, 15 - retaining ring, 16 - journal fixing screw, 17 - driver, 18 - pin, 19 - rollers, 20 - pin, 21 - ball pin seat, 22 - fifth gear fixing screw and nut.
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