I don't see a problem with that on level ground. It would take forever to get going, probably a top speed around 35mph, and it would melt the transmission from the torque-converter heat output getting it going LOL. Get to a 2% grade and he'd be lucky to climb it.

My first BlueBird Wanderlodge was powered by a 210hp CAT, weighed 26,000lbs,was 12'6" tall, and would run 72 on level ground. I lost an injector and had to pound the line shut, drove from Chicago to Milwaukee with one dry cylinder and still held 60mph.

The only thing that makes it hard for me to believe is brakes. If the truck engine wouldn't run, it would have no air compressor. With no air compressor, you get 1-2 applications of the brakes, and then the spring brakes come on. The spring brakes need ~65psi to hold off, will lock up the drive axles, is a safety for air system failure.

He likely used up one applicaton stopping the rig the first time, the airbags are consuming more air, ...

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Gone to the dark side

- Jeff