What oil is best for GKN diff?

[jmct]

Looking for recommendations for which grade to use and where to buy. Thanks.

[GR_TVR]

Castrol Syntrax 75W-140

Cheapest I could find today was £15.29 a litre delivered. You'll need two litres - I can't remember but the capacity is something like 1.3-1.7 litres, but just fill until it comes out of the fill level plug (when on a level surface, of course!)

https://www.autopink-shop.co.uk/oils/product?produ...

It's a pig of a job - enjoy!

[NZ fan]

for what its worth this is some research i did on the matter back in 2014.

Hi all, I have been trying to find the correct oil for my mk1 chim GKN Limited slip diff, the body plate says to use MobilubeHD90 which is a non LSD gear oil. I have emailed GKN and lo and behold they have replied as follows

[Belle427]

I used this last time.
https://www.classic-oils.net/Morris-XFS-80W140-Syn...