Model T transmission?

[logskidder]

Hi,  I have started to look over the aux. transmission forum and I don't see anything about using a model T transmission.  

At a family reunion I ran into a cousin that is trying to sell three Ford Model T transmissions.  I'm not sure what the difference might be between the model A and the model T.  I have an HG 68.  I was thinking that it might be nice to use the aux transmission to split the main transmission's three forward speeds into 9 speeds and the reverse into 6 speeds (3 with the main's reverse/aux's forward, and 3 with the aux's reverse/mains forward).  I suppose you could have an extra forward too if you used both transmission's reverses together.  Anyway, these trannies are 3 forward speed and one reverse.  

Anything is always possible, but has anyone tried using one of these model T trannies?  And what would three trannies go for?  

These three had what appeared to be different input and output shafts, some appeared to be longer or shorter.  One looked like it had a pulley attached to one shaft, another looked like it still had a clutch plate on one shaft.  I am guessing that people used these for a variety of projects over the years.

[wolcott@dmcom.net]

Don't know the difference between Model T and Model A, but I'd suggest staying with a known commodity. The engineering has been done and functioned correctly. And you should be able to find a good Model A transmission for under $100.
Dick

[logskidder]

Anybody have any web links that might describe how to identify a Model A transmission versus a Model T?  

Is the general idea with this conversion that the aux transmission is mounted to the bellhousing, the geometry of the aux transmission input shaft fits the clutch plate geometry, and then a short(er) propellor shaft is used between the aux tranny and the main tranny?

[Blake Malkamaki]

I'm no expert on Model T's, but I do know the model T transmission is unlike anything else. It is shifted with pedals and I believe has 2 speeds forward and one back. It also incorporates the car's brake. It uses bands and is similar to an automatic transmission except is manually operated.

I am sure you would not want this in an HG.

Blake

[logskidder]

Ahh..  Then these units I am thinking of are not model T transmissions.  they look like the pictures I see on this site.  They have a top mounted shift lever,  three forward speeds, one reverse, in an H-pattern.  the bolt pattern around one end is a 6 hole pattern and the other is a four bolt pattern.   I didn't think the input and output shaft were in line though.  I should have taken a picture.  Argh...  

I think I will buy these off of my cousin anyway.  I can think of lots of things that I could hook a little tranny to.  The three units all seem to spin and get in and out of gear okay.  What do you think three units would be worth.  Do you think maybe $100 for the three would be reasonable?  I could at least get one good one out of it.

[DaveInMI]

I paid $100 for the first one and $20 for the second.  Both were in usable condition.  No buyers remorse since the auxillary transmission makes such a difference in how well the dozer works.

[Fred]

Model T trannies, as noted, use pedals to shift the tranny. There are three pedals - low / high, reverse, brake - from left to right. There is not a normal transmission case; the engine and transmission share the same oil pan. Has anyone tried using the four speed chrashbox Ford truck tranny from the '30-'40s? The later (late '40s) four speeds have a removeable bell housing which might help.