| Cause of malfunction | Method of elimination |
| Noise in the gearbox | |
| Wear of gear teeth in the gearbox Bearing wear Low gearbox oil level | Replace worn parts Replace worn bearings Add oil to the gearbox. Replace damaged or worn seals in the gearbox if necessary |
| Difficulty shifting gears | |
| Incomplete clutch disengagement Deformation of the control rod of the gearshift mechanism or the reaction rod Loosening the screws that secure the hinge or the gear selector lever Incorrect adjustment of the gear shift drive Wear or breakage of plastic parts in the gearbox control drive | Cm. "Clutch" Straighten or replace the transmission control rods Tighten the screws (see "Disassembly and assembly of the gearbox and defect detection of its parts") Adjust the gearbox control drive Replace damaged parts in the transmission control drive |
| Spontaneous gear shifting | |
| Damage or wear to the ends of the synchronizer teeth on the gear and clutch in the gearbox Increased vibrations of the power unit on the supports due to cracks or delamination of the rubber on the rear supports Gear failure due to incorrect adjustment of the gearbox control drive | Replace worn and damaged parts in the gearbox Replace damaged powertrain components Adjust the gearbox control drive (see "Adjusting the gearbox control drive") |
| Noise (crackling) when gears are engaged | |
| Incomplete clutch disengagement Wear of the synchronizer locking ring of the engaged gear | Cm. "Clutch" Replace the synchronizer ring of the gear being engaged |
| Gearbox oil leak | |
| Wear of gearbox input shaft seals, constant velocity joint housings, gear selector rod or speedometer drive shaft seal The crankcase or gearbox cover is loose, or the sealant under the gearbox cover or between the gearbox housing and the clutch housing is damaged, the drain plug is loose | Replace the seals, the seal in the gearbox Replace the sealant, tighten the bolts and nuts, tighten the drain plug on the gearbox |
For more details, see the page [LADAMAN.ru]