Automatic vs CVT Transmission Replacement

Many cars and crossovers now use a continuously variable transmission (CVT) instead of a conventional geared automatic. If yours has failed, the replacement process is similar in outline but differs in a few important details.

How they differ

A conventional automatic uses a set of fixed gears and a torque converter. A CVT uses a belt or chain running between two variable-width pulleys, so it has no fixed gears. You cannot swap one type for the other in the same vehicle without major work; the replacement must be the same type as the original.

Matching a replacement

• Both: match by transmission code and VIN, and confirm the engine and drivetrain.
• CVT: versions can change within a model year and are closely tied to the engine and software, so the VIN is especially important.
• Automatic: check the number of speeds and whether the torque converter is included.

Programming and setup

Many modern transmissions of both types are controlled electronically and may need programming or a relearn procedure after installation. This is common with CVTs. Ask whether the control module or valve body is included with the unit, and have your installer confirm the procedure for your vehicle.

Fluids

Use only the fluid the manufacturer specifies. CVTs in particular need their own fluid, and the wrong one can damage the transmission quickly.

Before you buy a used unit

• Send your VIN and a photo of the transmission tag
• Ask about mileage and condition
• Ask what is included and whether programming may be needed
• Have the cooler and lines checked during installation, especially after an internal failure

Related: how to match a transmission using your VIN and how to find your transmission code.

Need a replacement? Browse CVT transmissions and automatic transmissions, or send your VIN for sourcing.