| Cause of malfunction | Method of elimination |
| Vibration, noise in the gearbox | |
| Loose or damaged engine mounts and gearboxes | Tighten the fasteners or replace the supports |
| Wear or damage to gears and bearings | |
| The wrong grade of oil was poured in | Fill with the required grade of oil |
| Insufficient oil level | Top up the oil to the required level |
| Engine idle speed adjustment malfunction | Adjust engine idle speed |
| Oil leak | |
| Destruction or damage of seals or O-rings | Replace seals or o-rings |
| Difficulty shifting gears and grinding noise when shifting | |
| Incomplete clutch disengagement | Adjust the clutch drive and bleed air from the hydraulic system |
| Gear shift cable failure | Replace the shift cables |
| Loose or worn locking rings and cones synchronizers | Repair the gearbox at the service center |
| Weakening the synchronizer springs | Repair the gearbox at the service center |
| The wrong grade of oil was poured in | Fill with the required grade of oil |
| Spontaneous gear shifting | |
| Wear of gear shift forks or breakage of detent springs | Repair the gearbox at the service center |
| Increased clearance of the synchronizer clutch on the hub | |
(The article was borrowed from the website: ChevyMan)