MN Triton Manual Gearbox oil / Diff oil

[veight]

I have had a search around & can not find the information I am looking for.

My MN Manual Triton has 11,000km on it & had developed a small whine in the diff @ 100km/h
The dealer said he could not fix something he can not find - next time i will take him for a run
Or it might be the fact that it has been lifted 2"

A diff breather has just been fitted & so i am thinking i will change the oil in the diff - There is no LSD Tag on the diff & there isn't a locker fitted. The service book & it states "Gear oil API Classification GL-5 or higher SAE80", after looking on the Castrol website it recommends using: the following oils

DIFFERENTIAL :CASTROL EPX 80W/90 Service Refill Capacity: 3.2 Litres.
4WD DIFFERENTIAL CASTROL EPX 80W/90 Service Refill Capacity: 1.2 Litres.
4WD TRANSFER :CASTROL VMX-M 75W/85 Service Refill Capacity: 2.5 Litres.
MANUAL TRANSMISSION: CASTROL VMX-M 75W/85 Service Refill Capacity: 3.4 Litres

What is every one else running in there gearbox/ transfer / diffs ?
It does mention to use LSD Oil if a LSD is fitted

[Longranger1]

I use Penrite SYN Manual Trans (full synthetic) in the gearbox and transfer case. In the front and rear diff's I use Penrite Limslip 90. In the rear diff which has the factory locker fitted, I added 125mL's of Nulon G70.

I changed the rear diff oil at 1500km's and the gearbox/transfer at 6000km's. If you have a GLX-R without a locker then a Limited slip diff oil will be fine.

I have done similar km's as you but my diff' is quiet (touch wood).