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Thanks Fu Manchu.There are several diffs fitted to these.
There will be a sticker on the left of the diff center if you get under there and have a look.
The sticker will have the details of ratios (of which there are several for Crewman and if it is LSD)
If your doing a rebuild, good chance to get an LSD centre in, if not fitted with one now.
if you can slip the diff cover off it should be stamped on the crown wheel.Well the sticker you mention has been found with the following information.
18D5 (with a circle around it).
My parts supplier wants to know do I need an M78 or M86 kit.
I don't know the answer.