Engine has a new reversible eccentric, and differential gear, with usual fittings.
differential gear in main axle, with locking device when both traction wheels are required to pull out of a hole.
Of the relative merits of different forms of differential gear there is little to be said.
By bevel gears and a long shaft the power is conducted to the differential gear in connection with the rear wheels.
The nuts firm, the brakes in order, the sprockets running true with the differential gear?