The M-4's came out with a torque converter in front, or behind, a three speed transaxle with a 817 cube Waukesha inline six for power. The way it was set up almost any engine could be dropped in to replace the thirsty Waukesha. The torque converter was handy, but it would eventually get worn and slip too much. The torque converter is a separate unit between the engine and tranny and it can be removed without taking anything else apart so I suppose the machine could be run with the engine direct connected to the tranny.
I was told a power line construction company in Minnesota used M-4's. Maybe this is the one. We're still looking for the shell box that goes on the back and I was informed this Minnesota company used M-4's and they might possibly be able to help. Jim
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