3022728 - S23 NOISE' GEARBOX / IN A SPECIFIC GEAR

Whilst driving, there is a cyclical or whistling noise in a specific gear. This noise decreases or disappears on changing gear
Results of the tests
1SPEED GEARS CHECKAll OKProblems metOperation
Overhaul the gearbox Op.   2110B20  . In particular, check the teeth of the gear concerned: they should not be worn or show signs of seizingContinue to Step 2Gears worn or damagedReplace the gears involved
2SPEED SLEEVES AND SELECTOR FORKS CHECKAll OKProblems metOperation
Check the selector forks and the sleeves for the speed concerned: they should not be worn or damagedContinue to Step 3Sleeves or selector forks wornReplace the components involved
3CORRECT OPERATION CHECKAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'