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  1. jollyroger

    The Unicorn; Or M37 broken long side axle shafts

    I forgot. I called Foote Axles out in California last week. They have a current part number for the rear axles. But they do not stock the part anymore. They can manufacture them. But a single, "sample" set would cost about $2,000. It is a big number because of the setup cost to manufacture the...
  2. jollyroger

    The Unicorn; Or M37 broken long side axle shafts

    So here's what I'm doing to "solve" the breakage problem until I can get some alloy axles made. What a PITA to get the case apart. Once you know how to do it, it still sucked. Ha Ha. I really like how the truck drives with the rear end Lincoln Locked up. It's a beast with the 327 Chevy. I...
  3. jollyroger

    The Unicorn; Or M37 broken long side axle shafts

    Back on track I want to thank all you guys for the tips on where to get aftermarket axles. I had a line on some several years ago and that dried up. I'm gonna call Foote today and ask some questions about the manufacturing process, material and cost. When I have results I will let you all know...
  4. jollyroger

    The Unicorn; Or M37 broken long side axle shafts

    From Wikipedia: A typical chemical analysis of this material: Iron Carbon 3.3 to 3.4% Silicon 2.2 to 2.8% Manganese 0.1 to 0.5% Magnesium 0.03 to 0.05% Phosphorus 0.005 to 0.04% Sulfur 0.005 to 0.02% Other elements such as copper or tin may be added to increase tensile and yield strength...
  5. jollyroger

    The Unicorn; Or M37 broken long side axle shafts

    You are absolutely correct. The 327 no matter how badly tuned will put out more power and torque than the 230 Derge flathead........It was amazing how quickly the shaft grenaded......I did not even get a chance to shift gears. :grin:
  6. jollyroger

    The Unicorn; Or M37 broken long side axle shafts

    I would have to agree with your assesment about the old school metalurgy. And design has a big role to play in this as well. It's like the difference between Cast iron and Ductile iron. Ductile Iron has more Nickel cast into the mix and that hardens the metal making it more durable. Ductile...
  7. jollyroger

    The Unicorn; Or M37 broken long side axle shafts

    To give everyone some background info about what happened I will explain. Dad traded for the truck in the picture. It's missing a bunch of sheet metal. It's on crappy, old, worn out tires. It has a 327 Chevy with a 2 bbl carb. Nothing special in the engine. SM 420 trans. I was at the top of...
  8. jollyroger

    The Unicorn; Or M37 broken long side axle shafts

    I am starting this thread to give some knowledge to the people that may not have much experinece with the M37. And some substantiation to the debate about how strong M37 axle shafts are. This subject has been debated at length on this forum. However ..........nopics
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