Rear Fill Allen Wrench

[Grizzly]

Does any one know where I can buy or know the size of the big allen wrench that fits the fill plug on the side of my 92's differential?

 

[Moonunit 451]

If it's the same as the 90 and I suspect it is I just happened to have one in my arsenal. I could get a measurnment on it tomorrow if you don't have the answer, but I'll bet the dealership could tell you.