75 series rear diff oil change

[Marcus75]

Hi. Just looking for what diff oil i should be using for my 1995 75 series rear diff which has a diff lock in it. And also how much oil to use. Thanks

 

[Hulsty]

Stock oil, check the lube guide on castrol site, has the recommended oil and volume.

 

[roscoFJ73]

You fill them to the fill plug hole. They do it that way so you cant overfill it. I always use Castrol 80 gear oil in the front diff, g/box and t/case. But I used the LSD oil in the rear diff.
Tip, remove the filler plug first so you know it will come off before you drain it.

 

[coldtaco]

probably would help to say what type of rear locker.