S20 GEARBOX DIFFERENTIAL UNIT NOISY'/ / GENERAL - Alfa - 147 - eLearn

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

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check whether the noise persists under all circumstances	Continue to Step 1	The noise is mainly noticeable during take off.	See table S21 NOISE' GEARBOX
			The noise is mainly noticeable in neutral	See table S22 NOISE' GEARBOX
			The noise is mainly noticeable in one gear only	See table S23 NOISE' GEARBOX
			The noise is mainly noticeable round bends	See table S24 NOISE' GEARBOX
			The noise is noticeable in all driving conditions	Continue to Step 1
1	CHECKING THE CROWNWHEEL AND PINION	All OK	Problems met	Operation
	Check the crownwheel and pinion. In particular: it should not be worn or damaged there should not be excessive clearance the crownwheel fixings should not be slack	Continue to Step 2	Excessive clearance or wear	Replace the crownwheel and pinion Op. 2110B20
		Continue to Step 2	Excessive clearance Fastenings slack	Replace the crownwheel and pinion Op. 2110D20
2	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'