S21 NOISE'' GEARBOX / AT TAKE-OFF - Alfa - GT - eLearn

When taking off, there is a noise when the various gears are engaged and the clutch is released or at the start of deceleration

1	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check: Kingpin attachment Shock absorber/suspension fastening Condition and attachment of bushes and flexible mountings securing power unit and moving suspension components Condition and play on steering balljoints	Continue to Step 2	Wheel fastenings slack	Retighten attachments
			Power unit flexible mountings damaged	Replace the damaged components
			Track control arm flexible mountings damaged	Replace track control arms
2	CHECKING THE GEAR SET	All OK	Problems met	Operation
	Check whether the crownwheel and pinion are worn or damaged, and that the crownwheel attachments are not damaged	Continue to Step 3	Crownwheel and pinion worn	Replace the crownwheel and pinion
3	CHECK ON DIFFERENTIAL UNIT	All OK	Problems met	Operation
	Check the wear of the satellite carrier bearing or the housing in the differential housingCheck differential bearing preload	Continue to Step 4	Housing worn	Replace casing
		Continue to Step 4	Preload not correct	Adjust preload as specified
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	.