Its hard to believe that after all the work Ive done on this model so far Im still on one page of posts LOL.

Any way, Today I modified the taigen 3.1 trannys.

They are stock ratio of 39:1 with a brass 10 tooth pinion gear. scale speed was about 18mph, just felt slow.
I removed the stock motors and installed Tamiya Johnson motors and new steel 11 tooth pinions.
This took some fitting and filing of the mount holes for a good gear mesh.
The new gear ratio raised to 33:1 which is getting kinda high and weak on torque but the scale speed jumped to like 30 pmh. Holy crap.
The Tamiya Johnson motors are so good they speed the tank up quite a bit then decrease the gear ratio one tooth on top of it and wow.
A stock Tamiya Sherman is 59:1 ratio and scale speed of 23.

Im now pondering the opposite. What if I put an 8 tooth pinion gear on the taigen with the Tamiya motors. Remember the stock is 10, I went up to 11.
Im betting the resulting gear ratio would be somewhere in the neighborhood of 51:1 so that would theoretically put me around 25mph ish.
Just some thoughts. I think Im going to be doing more experimenting.


Any way, this tank is coming along nicely and wow its fast. Probably going to have to reduce that...