M38A1 Warner T90 transmission
 

I’m currently overhauling my jeep transmission and have discovered a bit of a quandary, looking for some assistance.
The manual specified that the transmission is supposed to be a Warner T90C.
My trans is tagged on the top cover with T90C data plate.
Now, here is the issue-
A T90C has a 35 tooth cluster gear and a 16 tooth input gear.
A T90A has a 33 tooth cluster gear and a 18 tooth input gear.
Mine has the 33/18 set which would make it an A model transmission.
It seems that for whatever reason I have this set, wondering if the CF rebuilt it as an A model, was this an earlier transmission that was swapped, did they play mix and match or did they come ordered this way?
My jeep is a 1970 Cdn3 model.
The transmission appears to be original equipment
Ideas anyone?

Did some more digging and some consultation with another Think I just answered my own questions lol
I just went back and consulted the piece of crap Canadian manual about the transmission.
The manual stipulates it as a T90C. I started looking at the gear ratios given.
1st 2.79 2nd 1.55
I went to Novak and looked up the specs for the various models.
It clearly states a T90A1 model is 2.79 and 1.55
The C model is supposed to be 3.34 and 1.85
Not sure why they call the Cdn transmission a C model when it clearly isn’t.
Weird the case is tagged C and the manual says C yet the ratios line up with OEM specs in both the A model and the Canadian army manual spec.

transmissions
 

Just to add a layer to the conversation, at Sherbrooke Hussars we had a 67 M38A1 (IIRC) which had a longer shift lever than every other 67 or 70. It was just different. I don't recall its performance, but that Jeep had a good reputation, and I can visualize the throw of the shifter in the hand of a good driver.

Is the shift lever a factor in your transmission question?

I wish I read this post a week ago! I discovered the exact same as you. Case tagged as a C. With the gears of an A. Unfortunately it was only when I was about to install the new cluster gear that discovered the difference.

Al, It is a quandry that makes no sense to me. It is what it is .