CVT transmission: advantages and drawbacks

If you work in used-car retail, you know that every component matters when you assess a unit. One of the most relevant — and increasingly common in modern cars — is the CVT gearbox. But do you know exactly how it works, what advantages it has and how to diagnose it? In this article we explain it in detail.

What is a CVT transmission and how does it work?

The continuously variable transmission (CVT) is a type of automatic gearbox that, unlike traditional ones, does not use fixed gears. Instead, it uses a system of variable-diameter pulleys connected by a metal belt or chain, which allows an infinite range of gear ratios.

Main components of a CVT gearbox

• Driving pulley: connected to the engine.
• Driven pulley: connected to the wheels.
• Metal belt: transmits power between the two.

Difference versus other automatic transmissions

While a traditional automatic gearbox changes gear in fixed steps (1st, 2nd, 3rd…), the CVT adjusts the ratio continuously to keep the engine in its optimum rev range.

Advantages of CVT gearboxes for motor professionals

Smoothness and comfort for the end customer

The absence of abrupt changes improves the driving experience, something private customers value a lot in city cars, hybrids and family cars.

Efficiency in consumption and emissions

By keeping the engine in its ideal range, CVTs optimise fuel use, reducing consumption and helping meet environmental standards.

Adaptability to different driving styles

From relaxed city driving to more demanding stretches, the CVT responds without jerks or marked transitions.

Drawbacks to keep in mind with a CVT gearbox

Noise on hard acceleration

Some drivers notice a “constant drone” when they put their foot down, because the engine stays at the same speed while the car accelerates.

Cost of maintenance or replacement

Although the technology has evolved, some older or poorly maintained models can present expensive faults. Checking the condition before purchase is key.

Recommendations for diagnosis before you buy

• A smooth, progressive road test.
• A review of the maintenance history.
• Detection of abnormal noises or jerks (although they are uncommon).
• Use of an OBD scanner to check electronic errors in the transmission.

We explain it all quickly in this video!

If you want to learn more about the motor world, you like cars, auctions and used-car retail, this is your place!

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Which manufacturers use CVT gearboxes?

JATCO

Supplies CVTs to Nissan, Mazda, Subaru, Suzuki, BMW, VW and more. It is the world leader in this type of transmission.

Aisin

The second global manufacturer, a supplier to Toyota among other brands.

Honda

Produces its own CVT transmissions in-house, with good performance and reliability.