Check whether the fault is accompanied by gearbox noise with the vehicle parked and in neutral.

Check the gearbox/differential oil level

 Op. 0010T41 MANUAL GEARBOX OIL CHECK LEVEL AND TOP UP IF NECESSARY

Move on to Step 1

1. Noise detected from gearbox

2. Oil level not correct

1. Proceed as instructed in the

 See table S022 GEARBOX NOISE - IN NEUTRAL

2. Restore the correct level and carry out a road test.

 Op. 0010T41 MANUAL GEARBOX OIL CHECK LEVEL AND TOP UP IF NECESSARY

If the fault persists, move on to Step 1.

Wash the gearbox thoroughly, spread with talc and carry out a road test.

Visually check that there are no leaks.

In particular, check the condition of the gaskets:

- gear input shaft gasket;

- rear cover gasket;

- differential oil seal

Move on to Step 2

1. Leaks from gaskets

2. Leaks from left differential flange

3. Leaks from right differential oil seal

1. Replace the gaskets

2. Replace the flange

 Op. 2110D52 FLANGE ON DIFFERENTIAL - R.R. WITH DRIVESHAFT REMOVED

3. Replace the oil seal

 Op. 2110D63 RIGHT DIFFERENTIAL SHAFT OIL SEAL - R.R.

Use talc to check visually that the gear casing is intact

End of diagnosis

Casing damaged, with presence of cracks or deformities

Replace the gear casing, rear cover or entire gearbox

 Op. 2110B34 MANUAL GEARBOX (6 SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH, CHECK COMPONENTS, REPLACE SYNCHRONIZERS AND INTERNAL CONTROLS