125000687 - 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: also see [DI_X015]
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Press the clutch pedal and check whether the noise disappears or decreasesContinue to Step 1Noise remains constantContinue to Step 3
1GEARBOX/DIFFERENTIAL FLUID LEVEL CHECK Check the gearbox/differential fluid levelAll OKProblems metOperation
Continue to Step 2Level too lowRestore the correct level and carry out a road test. If the problem persists,Continue to Step 3
2GEARBOX BEARING CONDITIONS CHECKAll OKProblems metOperation
2.0 JTSOverhaul the gearbox Op.    Op. 2110B32 MANUAL GEARBOX (5 SPEED) WITH DIFFERENTIAL - DISMANTLE AND REBUILD - WASH AND CHECK PARTS - REPLACE SYNCHRONISERS, INNER CONTROLS, GEARS, SHAFTS AND BEARINGS. In particular, check the gearbox bearings: they should not show signs of wearContinue to Step 3Bearings wornReplace the bearings Op.    Op. 2110B32 MANUAL GEARBOX (5 SPEED) WITH DIFFERENTIAL - DISMANTLE AND REBUILD - WASH AND CHECK PARTS - REPLACE SYNCHRONISERS, INNER CONTROLS, GEARS, SHAFTS AND BEARINGS
1.9 JTD 16V3.2 V6Overhaul the gearbox Op. 2110B36. In particular, check the gearbox bearings: they should not show signs of wearContinue to Step 3Bearings wornReplace the bearings Op. 2110B36
3CLUTCH PLATE CHECKAll OKProblems metOperation

Check:

  • Thrust bearing;
  • 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 4Clutch plate or pressure plate faultyReplace the clutch plate Op.    Op. 1810A24 CLUTCH - R + R WITH GEARBOX REMOVED
Thrust bearing faultyReplace the bearing Op. 1820A30
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.