Diff gears

[Colin Foulkes]

I should maybe be a bit more specific with what I am looking for.
The standard diff in my truck and in the C15 is 37-6 tooth 6.166 ratio.
The ring gear and pinion which I am looking for is 38-7 tooth 5.428 ratio.
This ratio was used in ambulances and other such light duty units.
It was used in models 15, Y and M in 1941-42 and model 11 from 46-54.
It was apparently only used in 1.5 ton trucks with 160' wheelbase according to my parts book.
I do have a spare diff with the 38-7 gears but too much rust, took it out of a rag top ambulance which was too far gone to restore unfortunately.

Col.