The Transmission Gearheads Love to Hate Is Actually Banned F1 Technology

Believe it or not, the CVT has an F1 origin story

If you take a survey of any car enthusiasts of what they think about Continuously Variable Transmissions, or CVTs, you'll usually get sighs, groans, disgusted faces, or a long, expletive-laden rant of why they're a crime against humanity. CVTs have a reputation problem among "true" car enthusiasts and those who value driving feel. They're the kind of automatics that you'd find in economy cars, rental fleet crossovers, and every vehicle specifically designed to extract every ounce of drama and character for fuel economy.

From a realistic point of view, they're fine and they work. Even though some drivers hate them, most everyday commuters in a morning traffic jam don't care. All they know is that they're operating an automatic with the PRNDL that they're used to. However, little do those drivers know, that the CVT is actually tech that the FIA had to ban from Formula 1 racing. Yes, the same transmission in millions of commuter cars, and possibly including the one on your neighbor's driveway, was once considered a performance advantage so significant that the rulemakers of the world's premier motorsport said it cannot be allowed to compete.

How the heck does it work?

While horror stories on owner forums and subreddits would have you believe that it is some sort of complicated box that only wizards can actually fix or repair, the core idea behind a CVT is actually really simple. Instead of a fixed set of gear ratios; first, second, third, and so on and so forth, a CVT uses a pair of variable-diameter pulleys or cones that are connected by a belt or chain. By changing the diameter of each pulley, the transmission can smoothly deliver any ratio within a continuous range as if it were butter.

Unlike a conventional automatic or manual gearbox, CVTs do not require any steps to "shift." By running one continuous "gear," CVTs experience no gear changes, meaning that there are no brief interruptions in power delivery as one gear ratio changes to the next. In theory, this means the engine can always operate at exactly the RPM range where it makes the most power without interruption.

In something like a Nissan Altima, Honda Civic or Subaru Crosstrek, this manifests as the droning noise at higher RPM that some enthusiasts complain about. Here, the engine sits at a high RPM as the car accelerates, with no satisfying gear-change sensation to spice up the experience; as there are no "gears" in a CVT. However, things are different in racing. A race car engine that can easily reach and be constantly held in its optimal power band at all times, with no power interruptions between ratios, can be theoretically faster than any engine connected to a traditional gearbox, which has to go through the motions and the brief pauses of conventional gear changes; whether in an automatic or manual. These advantages can matter in places where decisions made in milliseconds can have real consequences; sports like Formula 1.

The Car That Rewrote the Rules

Although its race results these days say otherwise, Williams was once the dominant force in Formula 1. In the early 90s, it fielded cars with sophisticated electronics and engineering that caught competitors in McLarens and Ferraris lacking. In the hands of drivers like Nigel Mansell, Ricardo Patrese, Damon Hill and Alain Prost, they dominated the field with cars like the FW14B and FW15C, some of the most technologically advanced F1 cars to hit the grid. They featured cutting edge, but later banned driver aids like traction control, active suspension, and anti-lock brakes; stuff we see in normal, everyday passenger cars today.

However, during their technological dominance, they've developed something that would've made their drivers feel like they were driving on easy mode. In 1993, the team developed a CVT-equipped Formula 1 car as a research and development project that they could use the following season. Based on that season's FW15C, Williams teamed up with Van Doorm to create a CVT that could withstand the extreme demands of F1 and find out whether the performance advantage was real.

It was real. By using a CVT, Williams and Renault, the team's engine supplier at the time, could tune its V10 for more constant power. In addition, it could eliminate drivers from "money-shifting;" the kind of accidental, catastrophic high-rev downshifts that can end one's race. There were drawbacks; the worst being the high-picked sound of a V10 engine at over 10,000 rpm. However, this was something that then-chief designer Adrian Newey could care less about and was willing to sacrifice.

"[The CVT] would have sounded hideous to spectators, and would probably have been bad news for the sport […]," he wrote in his autobiography. "[…] Yes, it sounded horrible, but it's not our job to ensure that the car sounds nice or smells good or looks pretty. We're shark-like in our pursuit of purpose. We exist only to make the car go faster."

In a 2021 interview, F1 veteran and former Williams test driver David Coulthard recalled that the CVT was an incredibly breakthrough technology back in the early 90s; a time when the grid was transitioning from conventional "stick shift" manual gearboxes to the paddle shifters that Lewis Hamilton and Max Verstappen drive with today. He noted that despite some getting used to, the CVT gave the car a significant performance advantage that could shave several seconds off lap times; an edge that can mean winning or losing races.

"You had to get used to the fact that the engine would sit at its optimal power delivery," he told RaceFans. "[…] There was no gearshift, so no time loss. That was several years before we went to seamless shifts that saved you quite a bit of time, plus you would have had optimal power and constantly varying ratios. It probably would have been a good half second plus quicker than a standard car."

The car began extensive testing in the middle of the 1993 season, in preparation for a planned F1 roll-out for 1994, which took place at tracks like Silverstone and the Prembry Circuit in Wales. However, it never saw a Formula 1 race, as the FIA moved to ban CVT technology as soon as it heard that Williams was developing such technology. As part of a major rules package for the 1994 season that included bans on several "driver aids" that the Williams cars championed, the FIA mandated that all cars had to have conventional gearboxes with four to seven fixed gears. Additionally, they added a sub-clause specifically banning the CVT. All in all, this showed that the FIA believed that Williams' CVT was so fast, it could've made all other transmissions obsolete; a heck of a cosign for something so reviled.

From the pit lane to the parking lot

Though Williams was engineering racing CVTs, Japanese automakers were pursuing the technology for completely different reasons. In 1989, Subaru introduced the first vehicle equipped with a CVT in the U.S. market. The subcompact Justy ECVT hatchback's CVT powered a modest 66 horsepower, 1.2-liter 3-cylinder engine. In a review for MotorWeek, host John Davis noted that the smoothness that the CVT provided was "offset by a loud, raspy engine," though they praised its ability to achieve 35 miles per gallon.

Honda followed a similar path, as it began offering CVTs in 1996. First introduced in the high-efficiency Civic HX, the CVT was an optional extra for a trim level equipped with a special four-cylinder VTEC-E motor designed for better fuel economy than performance. By its last year on sale in 2002, it delivered impressive fuel efficiency, with EPA estimates at 36 mpg city and 44 mpg on the highway.

Today, many automakers from Toyota to Nissan offer CVTs across a vast majority of their modern lineups, from midsized sedans to compact crossover SUVs. Brands today utilize this technology to meet increasingly stringent fuel economy standards while also providing commuters smooth power delivery in stop-and-go traffic.

Maybe we should give the CVT another chance

The CVT has a bad reputation, but it is kind of unfair from a unique perspective. The road car implementations that gave it a bad name were often early, relatively crude versions prioritizing economy over feel. Things change over time; technology evolves and CVTs are in widespread use in today's modern cars. Despite their mechanically gearless nature, many modern CVT transmissions in bestselling cars such as Subaru, Honda and Toyota have adapted them to simulate shifts for a more traditional feel.

However, knowing its history might help the CVT's image. This isn't some boring transmission technology that was invented for boring cars; it's literally banned Formula 1 tech that would've gave one of its most dominant teams an extra advantage during a time when its drivers were truly playing on easy mode. The next time you complain that a certain car only comes in a CVT, remember, there's a direct bloodline between that and a Williams F1 test car that was too fast to race. It's sick lore that most transmissions don't have.

Copyright 2026 The Arena Group, Inc. All Rights Reserved.

This story was originally published May 6, 2026 at 1:30 PM.