S22 NOISE' GEARBOX / IN NEUTRAL - Fiat - DOBLO - eLearn

2582504 - S22 NOISE' GEARBOX / IN NEUTRAL

With the vehicle stationary, the gear lever in neutral and the engine running, there is a high frequency, low intensity noise in the area of the gearbox.The fault is often accompanied by an oil leak from the gearbox: See table X10 ENGINE COOLANT LEAKS

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Press the clutch pedal and check whether the noise disappears or decreases	Continue to Step 1	Noise increases or remains constant	Continue to Step 3
1	GEARBOX/DIFFERENTIAL FLUID LEVEL CHECK	All OK	Problems met	Operation
	Check the gearbox/differential fluid level Op. 0010T41	Continue to Step 2	Level too low	Restore the correct level and road test the vehicle.
	Check the gearbox/differential fluid level Op. 0010T41	Continue to Step 2	Level too low	Continue to Step 2
2	GEARBOX BEARING CONDITIONS CHECK	All OK	Problems met	Operation
	Overhaul the gearbox Op. 2110B32 In particular, check the gearbox bearings: they should not show signs of wear	Continue to Step 3	Bearings worn	Replace the bearings Op. 2110B32
3	CLUTCH PLATE CHECK	All OK	Problems met	Operation
	Verify: Clutch plate wear; Clutch plate fouling (oil or grease) Clutch plate not distorted; No damage to the pressure plate diaphragm spring; No damage to the flexible coupling springs	Continue to Step 4	Clutch disc or pressure plate faulty	Replace the clutch plate Op. 1810A20 Search for the fault starting from another symptom'
		Continue to Step 4	Clutch disc or pressure plate faulty	Also replace the gearbox input oil seal
3	CHECKING 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'