whining noise from rear axle on a 80 series

[Zig]

Guys
I have a whining noise from rear axle on my 80 series GXL. It started after a recent trip up north. It is not there all the time.
It appears to be worse between 60 - 80 km/h. Above 80 I guess the noise from the MTRs drown the axle nose.
Oil is 6 month old and looks good.
No diff oil leaks.
The cruiser has done 225k km.

Any suggestions on where to start looking?

Chers
Zig

[Dane Amoore]

Uni joints and wheel bearing are a good place to start. It is hard to tell exactly where these noises come from and these are common failures in the rear.

[HDJ105]

Most likely the pinion bearing, if you are sure it's coming from the diff.

[Davo1]

Could be the handbrake - mine whines all the time!! Ouch, sorry dear.

[Zig]

Thanks for the replies.
Looks like HDJ105 is spot on.
I had a diff place taking it for a test drive and that's what he said too. They are taking it apart and fixing it at the moment.
What a good exuse to put a an Airlocker, in when the diff is all ready apart.... event the wife bought it... :)