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A CVT gearbox, or continuously variable transmission, is a type of automatic transmission that provides seamless acceleration without distinct gear shifts. Unlike traditional gearboxes that have a fixed number of gears, a CVT uses a system of pulleys and a belt or chain to allow for an infinite range of gear ratios. This design optimizes engine performance and fuel efficiency by keeping the engine in its ideal power range during operation.
| Transmission type | Continuously Variable Transmission |
| Material | Aluminum or composite materials |
| Typical gear ratio range | Varies widely, typically 2.5:1 to 7:1 |
| Weight | 15 to 50 kg depending on design |
| Fluid type | Specialized CVT fluid |
When selecting a CVT gearbox, consider the specific application and vehicle requirements, including engine size and power output. It's important to specify the desired gear ratio range and ensure compatibility with the vehicle's engine and drivetrain. Additionally, inquire about the type of fluid required and any necessary certifications for performance and safety standards.
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CVT gearboxes provide smoother acceleration, improved fuel efficiency, and reduced engine wear.
CVTs are commonly used in smaller vehicles and hybrids but may not be suitable for high-performance applications.
It's generally recommended to change CVT fluid every 30,000 to 60,000 miles, but check the manufacturer's guidelines.
Regular fluid changes and inspections for wear are essential to maintain CVT performance.
CVTs can be reliable if properly maintained, but they may have higher repair costs compared to traditional gearboxes.
With proper maintenance, a CVT can last between 100,000 to 200,000 miles.