1970s Semi Truck Cabs: CB Radios, Twin Sticks and Tuck-and-Roll

Sleeper Cabs Come Of Age

Long-haul trucks had sleeper compartments long before the 1970s, but they started out as little more than a padded box behind the seat — enough room to lie down, nothing more. Through the 1950s and 60s, cabs slowly picked up curtains, storage cubbies and real cushioning as manufacturers realized comfort kept drivers alert and rigs on schedule. By the 1970s and into the 80s, manufacturers began stretching the cab itself, raising rooflines and giving drivers a proper walk-in sleeper instead of a crawl-through bunk. One builder pushed the idea further than anyone expected: a Florida outfit called LivLab bolted on a module with a kitchenette, a bathroom and a generator, turning a truck cab into something closer to a studio apartment on wheels. Most drivers never had anything that elaborate, but the direction was clear: the sleeper was becoming a second home, and the 1970s-80s cab set the template that later grew into the tall, insulated "condo" sleepers of the 1990s, complete with cabinetry and climate control.

Breaker, Breaker: The CB Radio Boom

Nothing defines the look of a period-correct dash more than a CB radio bolted under it. Truckers had used citizens band radio since the 1950s, but it stayed a novelty until 1973, when the oil embargo hit. Fuel got scarce, prices spiked, and the government followed with a nationwide 55 mph speed limit. For drivers paid by the mile, a CB became essential — a way to find a station that still had diesel, warn each other about speed traps, and organize convoys in protest of the price hikes. Channel 19 emerged as the shared highway frequency and stuck as "the trucker's channel," a title it still holds for real-time traffic, weather and "bear" reports today. The trend broke into mainstream culture when C.W. McCall's "Convoy" topped both the country and pop charts in January 1976, and by the late 1970s an estimated 14 million Americans held CB licenses, with tens of millions more radios in use unlicensed. Every driver picked a handle, and for a few years a coiled mic hanging from the headliner was as common as a rearview mirror.

Two Sticks, Twice the Gears

The second shifter in a cab like this isn't a spare — it's a separate transmission. A twin-stick setup pairs a main gearbox with an auxiliary box bolted behind it, each with its own lever. The main stick selects the base gear; the auxiliary stick splits or multiplies it, so a five-speed main paired with a two-speed auxiliary — a "duplex" — yields ten usable ratios, and the same main paired with a three-speed auxiliary — a "triplex" — could stretch to fifteen. It took practice: timing the auxiliary shift against engine revs while the main gear was already engaged, working the two levers almost like a drummer's hands. Done right, it let a loaded rig find exactly the right gear for a grade instead of lugging or overrevving. The two-stick approach eventually gave way to single-lever range-and-splitter transmissions that bundled both gearboxes into one shift pattern, but during the 1970s and 80s twin sticks were standard equipment on trucks from Peterbilt, Kenworth and other builders.

Reading the Dash, Feeling the Seat

Open the door on a well-kept cab from this era and two things stand out: the wall of round gauges facing the driver, and the seats. Tuck-and-roll upholstery — pleated vinyl, usually Naugahyde, stitched into narrow channels — had already been a hot-rod staple since the 1950s and carried straight into custom truck cabs, paired with wood-grain trim and chrome-ringed gauges. It wasn't just about looking good on a long haul; the padded channels held up to years of sitting better than flat bench cushions did, and a driver could tell a well-built cab from a stripped-down one just by running a hand across the seat.

Built to Outlast the Highway

That combination of character and durability is exactly why cabs from this period are still being restored today. Peterbilt 359s and Kenworth W900As from the 70s and 80s are regulars at truck shows, often rebuilt down to period-correct twin sticks, tuck-and-roll seats and a working CB tuned to channel 19. Swap meets and specialty upholstery shops keep the parts supply alive, from reproduction gauge faces to vintage-style radios that still key up on the trucker's channel. The technology has moved on, but the appeal of that cab — mechanical, tactile, unmistakably its own — hasn't.