Ryan's M3 medium

[maple_leaf_eh]

There is a small industry in Western Canada servicing spar yarders built on M32 ARV and M4 Sherman chassis'. Spar yarders are mobile winch based on as heavy a tracked chassis as possible, and have a tall telescoping cable stabilized tower up top. Loggers drive these things as high up the mountain as possible, string a skyline cable hundreds or thousands of feet cross country and winch logs up without gouging up the ground with skidders. One place advertises rerubbering roadwheels and tracks. No idea what $$ (Can or OZ?) they want. Something also tells me there are final drive and brake rebuilders too, but that might not be necessary for your beastie.