Carroll Jo Hummer is an independent long haul trucker whose whole life is tied up in two things: his wife and his truck The Blue Mule. He's no angel but he knows corruption when he sees it. When his greasy boss Duane (good ol' boy Slim Pickens) puts the arm on Hummer to deliver illegal cigarettes and slot machines, Carroll Jo refuses to go along. In doing so, he becomes an inspiration to other wildcat truckers looking to buck the system but he also becomes the target of a vicious campaign of intimidation endorsed by the corporate slimeballs in their ivory towers.
There's fist-fighting, road racing and down and dirty dialog galore as Hummer's war with his enemies escalates to "Walking Tall" levels. The concluding image of the Blue Mule smashing the glass emblem of the corrupt corporation is iconic.
This is a B-movie for sure and no Oscar contender, but the lives of the truckers are portrayed with some grit and realism. There's some breath-taking footage of cross-country journeys, particularly in a snowy Utah, and there's hardly a dull moment. Jan-Michael Vincent does fine as Hummer and it may be one of the best roles of his career (he did all his own stunts).
And how can you go wrong with a 70's cast that includes L.Q. Jones, Dick Miller, R. G. Armstrong, Don Porter, Kay Lenz, Sam Laws and Slim Pickens? Only obvious signs of sloppiness were a couple of shots where the boom mike or its shadow are visible. That's a minor quibble. If you're looking for a hell-raisin' bare knuckled story that pits a tough man against the odds, chances are this is what you are looking for.