Fiat Ulysse 2ltr petrol manual 90000 miles.
Last year at a wheel change I discovered the shaft boot had split with grease everywhere.It was replaced by a garage and when I picked it up the guy said they had to remove the shaft to fit the gaiter but not to worry as they had "topped up" the box afterwards.
I have just noticed a strange background noise when travelling at 45 / 60 a bit like road noise in that it has a deep note that remains the same if I "coast" the engine. It can come and go a bit at motorway speeds but it is definitely there.
Going back to the repair - if they didnt top up the box to make up for some oil loss could that account for the noise as in some sort of gearbox differential problem ? Can anyone tell me how to check the gearbox level as I cant see a drain / filler plug anywhere.
Anyway of tracking elimating sources of noise if you all think the gearbox is unlikely?
Any info ideas gratefully received...