22 · Diagnostics

Gearbox noise - in a specific gear

Make: Fiat
Model: Croma Factory Service Manual
Year: 2005–2010
Section: Noise / vibrations › Gearbox noise - in a specific gear

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Fault diagnosisGearbox noise - in a specific gear

GEARBOX NOISE - IN A SPECIFIC GEAR

1.8, 2.2

With the engine running, there is a noise (whistling inside the gearbox) when a specific gear is engaged. This noise decreases or disappears on changing gear

1	SYNCHRONIZER RING CHECK	All OK	Problems encountered	Operation
		Results of the tests
	Overhaul the gearbox Op. 2110B20 MANUAL GEARBOX (5-6SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH AND CHECK PARTS - REPLACE SYNCHRONISERS AND INTERNAL CONTROLS IF NECESSARY In particular, check the synchronizer rings of the gear engaged: there should be no wear on the inner surfaces.	Move on to Step 2	Seals worn	Replace the synchronizers Op. 2110B20 MANUAL GEARBOX (5-6SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH AND CHECK PARTS - REPLACE SYNCHRONISERS AND INTERNAL CONTROLS IF NECESSARY
2	GEAR CHECK	All OK	Problems encountered	Operation
	Overhaul the gearbox Op. 2110B20 MANUAL GEARBOX (5-6SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH AND CHECK PARTS - REPLACE SYNCHRONISERS AND INTERNAL CONTROLS IF NECESSARY In particular, check the teeth of the gear engaged: there should be no signs of wear or seizing	Move on to Step 3	Gears worn	Replace the gears involved Op. 2110B20 MANUAL GEARBOX (5-6SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH AND CHECK PARTS - REPLACE SYNCHRONISERS AND INTERNAL CONTROLS IF NECESSARY
3	REDUCTION GEAR CHECK	All OK	Problems encountered	Operation
	Check the reduction gear More specifically: - it should not be worn or damaged; - there should not be excessive clearance	End of diagnosis	Reduction gear damaged	Restore the clearance or, if necessary, replace the reduction gear

1.9 JTD 8v, 1.9 JTD 16v, 2.4 JTD 20v

With the engine running, there is a noise (whistling inside the gearbox) when a specific gear is engaged. This noise decreases or disappears on changing gear

1	SYNCHRONIZER RING CHECK	All OK	Problems encountered	Operation
		Results of the tests
	Overhaul the gearbox Op. 2110B34 MANUAL GEARBOX (6 SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH, CHECK COMPONENTS, REPLACE SYNCHRONIZERS AND INTERNAL CONTROLS In particular, check the synchronizer rings of the gear engaged: there should be no wear on the inner surfaces.	Move on to Step 2	Seals worn	Replace the synchronizers Op. 2110B34 MANUAL GEARBOX (6 SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH, CHECK COMPONENTS, REPLACE SYNCHRONIZERS AND INTERNAL CONTROLS
2	GEAR CHECK	All OK	Problems encountered	Operation
	Overhaul the gearbox Op. 2110B34 MANUAL GEARBOX (6 SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH, CHECK COMPONENTS, REPLACE SYNCHRONIZERS AND INTERNAL CONTROLS In particular, check the teeth of the gear engaged: there should be no signs of wear or seizing	Move on to Step 3	Gears worn	Replace the gears involved Op. 2110B34 MANUAL GEARBOX (6 SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH, CHECK COMPONENTS, REPLACE SYNCHRONIZERS AND INTERNAL CONTROLS
3	REDUCTION GEAR CHECK	All OK	Problems encountered	Operation
	Check the reduction gear More specifically: - it should not be worn or damaged; - there should not be excessive clearance	End of diagnosis	Reduction gear damaged	Restore the clearance or, if necessary, replace the reduction gear

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Parts & tools for this job For 2005 Fiat Croma

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