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I run 4.56's with 35's (34.5" actual) with a 4 speed in my Bronco.
It runs about 2700 rpm @ 60 mph. It is a little high, but it sees more trail than freeway. I am planning a jump to 37's which would drop it to about 2500 rpm. And maybe a 5 speed with dual transfer cases in the future.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.