The Kyosho Progress was release by Kyosho during 1984. It was the first four wheels drive with four wheels steering RC buggy of history. And it was also the first 4wd from the manufacturer.
A kyosho scorpion gearbox is modify to accept a chain extended to a front gearbox without differential. There is one-way bearing into each rim to do the job.
Kyosho use only one damper to the front with torsion bar as a spring, which is particulary difficult to set for a smooth damping.
David from RC4ON
More in gallery: Kyosho Progress