Gearbox or diff whine?

[twincamtim]

OK, so my 7 has developed a distinct whine somewhere from the rear - it only occurs once the car is warmed up and when I partially or fully lift off the throttle. Seems to be in 3rd, 4th & 5th only but very difficult to hear anything in lower gears due to exhaust noise etc. Having a passenger doesn't affect it.

Anyone come across this? My thoughts were either some gearbox or diff bearing issue?? Specifically, there is an (old) oily look to the gearbox casing but the bellhousing is clean - can't currently check the diff due to a short term mobility problem. Car just had a new comp clutch fitted by CC and the whine has occurred since then.

Could it just be the gearbox/diff needs oil?

Facts: 2001, 1.8L, 120bhp Roadsport with 5 speed box and standard diff. and suspension.

[SM25T]

Did they change the clutch release bearing ? Would be worth getting oil levels checked in both gearbox and diff .... for peace of mind.

[twincamtim]

Thanks SM25T - yes, new CRB fitted at the same time. It is due for service in about a month and oil level checks will be included.

Is there anything else gearbox/diff related I should be getting checked at the same time?

[SM25T]

Could be the set up of the diff. If it only started after the clutch was changed, I would be taking it back to the place that changed the clutch to ask why

[twincamtim]

That would be CC Midlands then.....where it will be going for the service, probably.