T10 identification

[davez]

I thought I remember reading if a t10 has 2 grooves in the main shaft, that's an indication of close ratio gears.  Does anyone know if this correct?  I've seen them with one groove and 2.
Dz

[Road Reptile]

Hi Dave,
Looks like you need to open this up and inspeçt,then count teeth to know exàct geàr ràtios.Easy to do if already out as pictured.Is it an aluminium case?
R.R

[davez]

Cast iron. Going to look at it. Not in hand at the moment.  I thought the number of grooves helped indicate different sets of gears.
Dz

[kram350]

My "M" trans has 3 grooves, very thin. B-W # T-10M-16.
Also have an "L" input, it has 1 groove. Ford C3AZ-7017-G T-10L-16

You could have the "H" ratio, with 2.73/2.04/1.50/1.1 R2.80
cluster 31-24-19-17
1st 36
2nd 30
3rd 28
main drive 24

Hope this helps.