22 · Diagnostics

Noise'' gearbox / at take-off

Fault diagnosisNoise'' gearbox / at take-off

NOISE'' GEARBOX / AT TAKE-OFF

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 housing Check 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

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