939009747 - S023 GEARBOX NOISE - IN A SPECIFIC GEAR

With the engine running, there is a noise (whistling inside the gearbox) when a specific gear is engaged. This noise decreases or disappears on changing gear

		Results of the tests
1	SYNCHRONIZER RING CHECK	All OK	Problems encountered	Operation
	Overhaul the gearboxOp. 2110B20 MANUAL GEARBOX (5-6SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH AND CHECK PARTS - REPLACE SYNCHRONISERS AND INTERNAL CONTROLS IF NECESSARYIn particular, check the synchronizer rings of the gear engaged: there should be no wear on the inner surfaces.	Move on to Step 2	Seals worn	Replace the synchronizersOp. 2110B20 MANUAL GEARBOX (5-6SPEED) WITH DIFFERENTIAL - DISMANTLING AND REASSEMBLY - WASH AND CHECK PARTS - REPLACE SYNCHRONISERS AND INTERNAL CONTROLS IF NECESSARY
2	GEAR CHECK	All OK	Problems encountered	Operation
	Overhaul the gearboxOp. 2110B20 In particular, check the teeth of the gear engaged: there should be no signs of wear or seizing	Move on to Step 3	Gears worn	Replace the gears involvedOp. 2110B20
3	REDUCTION GEAR CHECK	All OK	Problems encountered	Operation
	Check the reduction gearMore specifically:- it should not be worn or damaged;- there should not be excessive clearance	End of diagnosis	Reduction gear damaged	Restore the clearance or, if necessary, replace the reduction gear