The Stovebolt Site Forums The Shop Area Driveline 46 1/2T 3spd. mod. for 3/4 T u-joint

need some brain power, trying to find out how to modify my existing 3 spd. trans torque tube setup, to run a 3/4 T open drive line. My interchange book sats they share the same case & gears, but can't find anyone to verify. Tranny guy says they are completely different and I need to change the bellhousing too. Anyone done this? or?

Going from a TT 1/2 ton setup to a 3/4 open drive there is a difference in the rear gears. You will be much slower doing this. What are you trying to accomplish?

if I go to open drive shaft, I can change the rear end to a later year W/better gear ratio selection. All I will need to do is custom the drive shaft. The rearend gear ratio is currently 411 but that could go away by changing rear end. Getting the diagrams or right info on compatibility is my challenge.

Or you can install a 3:55 gear set from Patricks. That is what I did and can cruise at 65 all day long.

You are right, but if I can figure the open drive there are more options.

All 1946 3 speeds are designed for torque tubes.
In some cases a short inclosed drive line was used that would bolt to the trans and would be setup for open on the rear. Front propeller shaft

thanks, I am going to see a guy tomorrow thats been working on these for 20+ years and get his input. I think that short shaft bolt-on might be the ticket.

I did design another way to convert one of those transmissions to open drive but it takes a little machining.
You can private message my if you want more info.