Diff oil still good ..

[Gazmitchell]

So after the grief of filler plug removal finally sorted, I am re filling the diff and had already drained what I think is the original gear oil - judging by the filler plug seized etc . It's a dark colour now yeh, but seems still nice and thick . I've purchased some diff oil from opie and have to say it seems a lot thinner than the stuff that come out .... I have sintopoid 75w -85 but reckon the stuff that came out feels more like 90 ? ... I do have some Castrol 90 so which to put in ?

[rynaqui]

IIRC, diff oil is 75w90

[s2driveruk]

yup...

[Morris400]

75w90 is what I'm using tomorrow on my diff.

[Gazmitchell]

But the oilman recommends 75 -85 which what I bought ... But think I may go Castrol gear oil 80-90

[andy10v]

You can just go to the dealer and buy the original stuff.