Production of locomotives has now ceased, and rights to the spare parts business have been sold to Williams Distribution.
Fate patent application filed in 1917 shows the engine driving a clutch and a continuously variable transmission that allowed varying the speed through zero to reverse the locomotive.
[5] All early Plymouth locomotives were powered by gasoline-burning internal combustion engines, but in 1927 the first diesel was produced.
[citation needed] Early Plymouth gasoline-powered locomotives were built with Chrysler engines.
Plymouth produced locomotives in most rail gauges, mostly with mechanical torque converter transmissions.