It looks like the front axle was replaced with a non-steering set-up. I wonder why they bothered. Wouldn't it work just as well with the stock front axle and steering equipment?
Perhaps they couldn't mount the train wheels on the orig. set-up.
Several English railways (including Kent & E Sussex, Derwent Valley, Shropshire) and the Irish Donegal Railway built and used these 'Railmotors' based on the TT in the 1920s. A few lasted until the 1930s.
They usually had two vehicles, back to back,with aux gearboxes, not least to give a neutral for the rear towed unit (only one engine was used at a time, except on very steep gradients on market days). Some had a third 'dead' carriage in the middle.
They were noisy and uncomfortable, but much cheaper to operate than steam trains on 'branch lines'
It was better to fit a solid axle than lock the steering and maintain the Ford axle.
Colin Shutt has built a replica in recent years.
Interesting that the original was LH drive.