It has 3 frame rails bent as c channel from 22 gauge galvinized stock. inside rails are one inside the other with 3rd rail outside. 1 inch tall by 1/4 inch wide.
Drive is Tamiya standard 3 speed then a split shaft pto 1:1 then an RC4WD R2 two speed. i like the speeds and torque is plenty. i have sheared two drive pins on test pushes so far. and had to switch from plastic to metel gears in the 1:1 motor combiner.
Rear and front suspension are scratch built front leafs are from Tamiya F 350 rear leafs are scratch built.