Tournarocker Diversion Build

[9W Monighan]

Since I don't have any trucks to fool around with I decided to convert an old 1953 Nylint Tournarocker sandbox toy to RC. The 1:1 machine was a diesel electric driven tractor steered by turning switches on and off on the dash and dumping is achieved by a winch with it's cable attached under the rear axle that pulls the rear forward dumping it's payload. I'll update some vintage photos when I scan them.
I want this to be a fairly simple conversion that uses a dual transmission controlled by a Dual Sabertooth motor control giving the machine "tank" steering similar to the 1:1 machine.
Original toy only thing missing is the oscillating hitch :




Here is the start of the housing:






Tapping 1-72 threads is SO much easier than tapping the thousands of 0-80 threads on my dragline model.


Trying to find the sizes the ring and pinion are set up to.


This set up is a Axial 13/43 ratio. This is a nice gear set -Helical and heat treated.


Half partially done. I want to install ball bearings through out when Im sure I have the ring and pinion set correctly.