S20 Gearbox / differential noise - generic
- Make
- Fiat
- Model
- Seicento Factory Service Manual
- Year
- 1998–2010
- Section
- Noise and vibration › S20 Gearbox / differential noise - generic
DiagnosisS20 Gearbox / differential noise - generic
S20 Gearbox / differential noise - generic
With the engine running and car on the move, a noise is heard in the gearbox area in all conditions.
If the noise is noted in neutral, see table S22
If the noise is noted in one gear only, see table S23
If the noise is noted when cornering, see table S24
| Step | Validity | Operation to be performed | Test results | ||
|---|---|---|---|---|---|
| OK | ⚠ | 🔧 | |||
| 1 | CHECK GEARBOX/DIFFERENTIAL OIL LEVEL | Check gearbox/differential oil level PROCEDURE OP. 2110A04 |
All OK Go to Step 2 |
Problems found Insufficient level |
Intervention Restore correct level and run a road test, go to Step 2 |
| 2 | CHECK GEARS | Overhaul the gearbox (PROCEDURE OP. 2110B32) In particular, check gear teeth: they should not be worn | All OK Go to Step 3 |
Problems found Worn gears |
Intervention Replace gears PROCEDURE OP. 2110B |
| 3 | CHECK SYNCHRONISERS | Overhaul the gearbox (PROCEDURE OP. 2110B32) In particular, check the synchronisers: inner surfaces should not be worn | All OK Go to Step 4 |
Problems found Worn synchronisers |
Intervention Replace synchronisers PROCEDURE OP. 2110B |
| 4 | CHECK REDUCTION GEAR PAIR | Check reduction gear pair. In particular: – it should not be worn or damaged – there should not be excessive play |
All OK Go to Step 5 |
Problems found Damaged reduction gear pair |
Intervention Restore clearance or replace reduction pair PROCEDURE OP. 2110D28 |
| 5 | CHECK CORRECT OPERATION | Check the fault is no longer present | All OK End of test |
Problems found Fault persists |
Intervention Seek the fault starting from another symptom (the noise was not interpreted correctly) |
Parts & tools for this job For 1998 Fiat Seicento
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Fiat Seicento
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