CVT Belt vs Chain: What’s the Difference and Why It Matters

Continuously Variable Transmissions (CVTs) use either a steel push belt or a steel chain to transfer power between two variable pulleys. Both systems deliver smooth acceleration and efficient power delivery, but the belt or chain design can influence torque capacity, wear patterns, noise, and servicing requirements.
If you want a quick refresher on the basics first, read  How does a CVT work?.

How a CVT Transfers Power

Instead of shifting through fixed gears, a CVT changes ratios by adjusting the pulley faces. The belt or chain rides higher or lower in the pulley grooves, changing the effective drive ratio smoothly.

This is why hydraulic pressure and fluid condition are critical; the system relies on a strong, consistent clamping force to prevent slip. CVT NZ’s guides on warning signs and common fault codes are good supporting reads if you have symptoms already:

• Top 8 symptoms to look for to identify a transmission problem
• Common transmission error codes and what they mean

What Is a CVT Belt?

A “belt” CVT is usually a steel push belt, designed to transmit power through compression between the belt elements and pulley faces. Bosch, a major supplier of pushbelt technology, describes the pushbelt as a key CVT component that transmits engine output to the drive axle.

Pros of a CVT Belt

• Very smooth, seamless acceleration
• Efficient for many small to mid-size vehicles
• Common design with wide parts and service knowledge

Cons of a CVT Belt

• More sensitive to heat and fluid breakdown
• Wear accelerates if clamping pressure drops or if incorrect fluid is used
• Higher risk if towing beyond the vehicle’s rating

For belts and correct-fit parts, see Parts we can supply, which includes push belts and service kits.

What Is a CVT Chain?

A CVT chain is a steel link chain that transmits power through friction at the contact surfaces, typically handling higher torque loads than many belt systems.

Audi’s Multitronic self-study programme explains that the variator uses a special chain running between the tapered pulleys, and that the chain design supports high transferable torque and efficiency.

Pros of a CVT Chain

• Stronger torque handling in many applications
• Often well-suited to heavier vehicles or higher load demand
• Can offer durability benefits in real-world driving

Cons of a CVT Chain

• Complex internal design, correct servicing matters
• Can become noisy if wear develops
• Still highly dependent on correct fluid and cooling