What kind of transmission is in the Lexus RX 450h?
The Lexus RX 450h uses an electronically controlled continuously variable transmission (eCVT) as part of Toyota-Lexus Hybrid Synergy Drive.
In this article, we explain what that means for how the vehicle accelerates, how power from the gas engine and electric motors is blended, and how all-wheel drive is implemented in the hybrid setup.
How the transmission fits a hybrid system
The RX 450h pairs a 3.5-liter V6 gasoline engine with electric motors and a battery, routing power through an eCVT rather than a conventional stepped automatic. The eCVT, built around a planetary gearset, continuously adjusts gear ratios to keep the engine in its optimal range while switching between electric, gasoline, or blended power as conditions demand.
Key characteristics of the RX 450h's eCVT
The following highlights explain the core aspects of the transmission in this model:
- Type and role: electronically controlled CVT (eCVT) integrated with Toyota/Lexus Hybrid Synergy Drive to combine electric and gasoline power with smooth, continuous gear ratios.
- Powertrain integration: a 3.5-liter V6 engine paired with electric motors and a battery; the transaxle houses the drive motor(s) and interfaces with the wheels.
- All-wheel-drive behavior: AWD models add a rear electric motor to power the rear axle as needed for traction, without a traditional driveshaft to the rear wheels.
- Driving experience: the system emphasizes seamless acceleration and efficiency, with no distinct gear shifts felt by the driver.
- Regeneration and efficiency: regenerative braking recharges the battery, and the system can shut off the engine when electric drive is possible to save fuel.
In summary, the RX 450h's transmission is an electronically controlled CVT designed to work with a hybrid powertrain, delivering smooth power delivery and improved efficiency across driving conditions.
Summary
The Lexus RX 450h uses an eCVT as part of its Hybrid Synergy Drive, combining a V6 engine with electric motors and, on AWD models, a rear electric motor for traction. This setup delivers seamless power, fuel efficiency, and variable all-wheel drive without traditional manual gear changes.
