One of those speed reducers went for $600 at an auction I attended year and a half ago. It is a planetary gear set. The housing didn't look too strong.
If you go to the Farmall Cub site, several people have made the point that the reducer is only meant to slow down the tractor. It can't be used to amplify torque without breaking the left hand final drive. Apparently the upper shaft (pinion shaft) will shear.
It looks like a lousy piece of engineering. When in low range, the differential spider is in constant motion. They don't have the bearings for that kind of abuse.
But what the heck. People who work Cubs are used to repairing them.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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