I may be way off here, but I think it's just a simple math problem.

Ring teeth / pinion teeth = ratio.

41 / 11 = 3.72

I'm open to being corrected if this is wrong.

i know i already thanked you - mark and tom but i wanted to expand on
that.  you see we live in a small mountain town and it was going to
cost me either $600 for the spare parts which would have to be ordered
or i had 2 options.  This is for the vehicle i use as a plow truck and
without a plow truck we are in trouble in the winter (50 miles S. of
Canada).    I was going to have to either pay $600 and wait - and still
not know the gear ratio, buy a used one (scary) or buying a $3500 truck.
Since plows are so hard on vehicles there was never a question of
putting it on my main rig.  Just thought you'd like to know - what i
need is in stock for $300 so not only am i saving money, i'm saving a
headache.