22 · Diagnostics

Gearbox differential unit noisy/ / general

Fault diagnosisGearbox differential unit noisy/ / general

GEARBOX DIFFERENTIAL UNIT NOISY/ / GENERAL

With the engine running and the vehicle moving, there is a noise from the area of the gearbox in all conditions.

1	GEARBOX/DIFFERENTIAL OIL LEVEL CHECK	All OK	Problems met	Operation
		Results of the tests
	Check the gearbox / differential oil level Op. 2110A04	Continue to Step 2	Level too low	Restore the correct level
2	BEARINGS CHECK	All OK	Problems met	Operation
	Overhaul the gearbox ( Op. 2110B20) In particular, check the condition of the bearings	Continue to Step 3	Bearings worn	Replace the bearings involved
3	CHECK GEARS	All OK	Problems met	Operation
	Overhaul the gearbox ( Op. 2110B20). In particular, check the gear teeth: they should not be worn or show traces of seizing	Continue to Step 4	Gears worn	Replace the gears involved
4	CHECKING THE GEAR SET	All OK	Problems met	Operation
	Check the crown wheel and pinion reduction gear ( Op. 2110D20) In particular: it should not be worn or damaged there should not be excessive clearance	Continue to Step 5	Reduction gear damaged	Restore the clearance or, if necessary, replace the reduction gear
5	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.