Re: 1938 85 1.5 ton gearing
The calculator I’ve used bases speed on engine RPM. Guessing 2500 rpm with the 5.14 and 34” tires it gives 49.22 mph. Stu
https://spicerparts.com/calculators/...rpm-calculator
Edit: playing with this it looks like a 7.00-20” tire at 35” tall gets you up to 50.66 mph.
https://spicerparts.com/calculators/...rpm-calculator
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Stu McMillan
Marmon-Herringtons
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