C02 Difficult gear enagagement or disengagement

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2002
Section: Gear shifting › C02 Difficult gear enagagement or disengagement

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Fault diagnosisC02 Difficult gear enagagement or disengagement

C02 Difficult gear enagagement or disengagement

The engagement of the gears is difficult; there is also noise in the gearbox area (the gearbox grates)

Step	Test procedure	Result	Action
1	CLUTCH CHECK Check that the clutch releases properly: with the engine running, press the clutch pedal and engage a gear	OK	Move onto step 3
1		The gearbox always grates in any gear: the clutch does not disengage	See table E01 CLUTCH DOES NOT RELEASE CORRECTLY End of diagnosis
2	CHECK ON ELECTROHYDRAULIC UNIT Using the diagnostic equipment, carry out the operations described See table C01 STIFF GEARSHIFTING CONTROL Steps 4 - 5 - 6	OK	Move onto step 3
2		No problems are found in the electrohydraulic unit, the geabox noise persists.	Check the clutch assemblySee table E01 CLUTCH DOES NOT RELEASE CORRECTLY Steps 4 - 6 - 6 End of diagnosis
3	CHECK GEAR SELECTION Check the condition of the pre-synchronizers	OK	Move onto step 4
3		Pre-synchronizers damaged	Replace the pre-synchronizers End of diagnosis
4	CHECK ON SYNCHRONIZER RINGS Overhaul the gearbox in accordance with the procedures; in particular check that the synchronizer rings are not worn on the internal surfaces	OK	Move onto step 5
4		Seals worn	Replace the synchronizers End of diagnosis
5	CHECK GEARS Overhaul the gearbox in accordance with the procedures, checking in particular the gear front teeth; they should not be excessively worn or chipped	OK	Move onto step 6
5		Gears worn	Replace the faulty gears End of diagnosis
6	CHECK HUBS AND SLIDING SLEEVES Overhaul the gearbox in accordance with the procedures and check that the hubs and sliding sleeves do not show wear or excessive play.	OK	Move onto step 7
6		Sleeves or hubs excessively worn	Replace worn parts End of diagnosis
7	CHECK ON CORRECT OPERATION Check that the fault is no longer present	OK	Incorrect selection of diagnostic procedure
7		Fault persists	Incorrect selection of diagnostic procedure

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Parts & tools for this job For 2000 Alfa Romeo 147

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