I have a 2-speed in my fire engine with a direct drive trans. It's an Eaton rear geared at 6.14/8.36 and I run between 60 and 65 mph all day long with 11.00 x 22.5 tires. I think the engine is turning between 3500-3700 rpm.
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD