4.something may or may not be a possibility for that axle model (whatever it is), but without knowing the axle model the 4-7 something pretty much covers the possibilities.
You really can't learn anything from our guesses, you'll just have to see what it really is.
Now if it was an older axle we could probably narrow the choices, but a newer axle like that could have a whole range of ratio choices.
Grigg
