Noise gearbox / in neutral
- Make
- Alfa Romeo
- Model
- 147 Factory Service Manual
- Year
- 2000–2004
- Section
- Noisy / vibrations › Noise gearbox / in neutral
Fault diagnosisNoise gearbox / in neutral
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: also see Table X15
| Results of the tests | ||||
| 0 | FIRST CHECK | All OK | Problems met | Operation |
|---|---|---|---|---|
| Press the clutch pedal and check whether the noise disappears or decreases | Continue to Step 1 | Noise remains constant | Continue to Step 3 | |
| 1 | GEARBOX/DIFFERENTIAL FLUID LEVEL CHECK | All OK | Problems met | Operation |
| Check the gearbox/differential fluid level Op. 2110A04 | Continue to Step 2 | Level too low | Restore the correct level and road test the vehicle. Continue to Step 3 | |
| 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:
| Continue to Step 4 | Clutch disc or pressure plate faulty | Replace the clutch plate Op. 1810A20 | |
| Thrust bearing faulty | Replace the bearing Op. 1820A30 | |||
| 4 | CHECK ON 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' | ||
Parts & tools for this job For 2000 Alfa Romeo 147
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Alfa Romeo 147
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