In the event of a fault: Replace the defective part or parts and/or route the selector and shift cables correctly.
Make sure that the cables are properly positioned in the area of the levers on the gearbox (whether there are foreign objects, etc.).
Check the position of the shift lever housing boot.
In the event of an abnormality: repair the initial adjustment device (see corresponding operation).
Check the condition of the adjusting device.
If the gearshift is OK: check the oil level in the gearbox.
If more than a liter of oil is missing (0.5 l for J type gearboxes), replace the transmission and check for leaks after a road test.
If less than a liter of oil is missing (0.5 l for J type gearboxes), correct the oil level. If the problem persists, go to the next step.
Check the appearance of the oil:
- the dark color of the oil is not a defect;
- the smell of burning oil is the result of overheating of the gearbox (due to insufficient oil level or intensive use);
- the presence of bronze-colored stains is not a defect;
- the presence of aluminum-colored particles indicates serious internal damage to the gearbox.
If there are particles of aluminum color in the oil, replace the gearbox.
Disconnect the cables from the gearbox and check the normal movement of the cables.
If abnormal, replace shift lever housing assembly.
If the cables are OK, check the clutch operation.
Make sure the clutch is not «leads», by checking its turn off point. If the clutch is correct, remove and open the gearbox.
If there is sticking when shifting from 5th to 4th gear on a Type J cable operated transmission, replace the lock kit (2) reverse.
Check the free movement of the clamps (3) and their correctness.
If there are deviations from the norm, replace the clamps.
If the latches are OK, replace the gear or gear parts (gear, hub, clutch, synchronizer ring and circlip).