Cause | Method of elimination |
Noise in the gearbox | |
| Bearing noise | Replace defective bearings |
| Wear of gear teeth and synchronizers | Replace worn parts |
| Low gearbox oil level | Add oil. If necessary, eliminate the causes of oil leakage |
| Axial displacement of shafts | Replace the bearing retaining parts or the bearings themselves |
Difficulty shifting gears | |
| Incomplete clutch disengagement | Cm. subsection 5.1.1 |
| Gear shift lever spherical joint sticking | Clean the mating surfaces of the spherical joint |
| Gear shift lever deformation | Correct the deformation or replace the lever with a new one |
| Tight movement of fork rods (burrs, contamination of rod seats, jamming of locking crackers) | Repair or replace worn parts |
| Tight movement of the sliding sleeve on the hub when the splines are dirty | Clean the parts |
| Deformation of gear shift forks | Straighten the forks, replace them if necessary |
Spontaneous gear switching off or fuzzy gear switching | |
| Wear of balls and rod seats, loss of elasticity of retainer springs | Replace damaged parts with new ones |
| Wear of synchronizer locking rings | Replace the locking rings |
| Synchronizer spring failure | Replace the spring |
| Wear of synchronizer clutch teeth or synchronizer ring gear | Replace the clutch or gear |
Oil leak | |
| Wear of primary and secondary shaft seals | Replace the seals |
| Loosening of gearbox housing covers, damage to sealing gaskets | Tighten the nuts (the moment is specified in the appendix) or replace the sealing gaskets |
| Loosening of the clutch housing fastening to the gearbox housing | Tighten the nuts |
(Information copied from the portal VazBook.ru)