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rotorwrench · 09-17-2018, 12:18 PM

You'll have to look into a New Venture NV4500 or an old Clark 280VO if you can find one. I have no idea how hard it would be to adapt but the NV4500 is a 5-speed OD transmission with PTO cover plate. The old Clark OD types are hard to find.

A gear vendors OD on an NP435 is another possibility. Most of the older 1 1/2-ton trucks had a 2-speed rear axle so they didn't need an overdrive.

09-17-2018, 12:18 PM	#36
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,447	Re: 43 Marmon Herrington 4x4 top speed You'll have to look into a New Venture NV4500 or an old Clark 280VO if you can find one. I have no idea how hard it would be to adapt but the NV4500 is a 5-speed OD transmission with PTO cover plate. The old Clark OD types are hard to find. A gear vendors OD on an NP435 is another possibility. Most of the older 1 1/2-ton trucks had a 2-speed rear axle so they didn't need an overdrive.