Porsche Taycan's Two-Speed Rear Gearbox Fully Explained

Porsche fitted an automatic two-speed gearbox on the Taycan's rear axle to combine strong from-rest acceleration with sustained high-speed performance. Unlike most electric cars that use a single reduction gear because electric motors produce usable torque across a wide speed range, Porsche chose a different path for the Taycan to meet specific sports-car objectives.

How the two-speed gearbox works and where it sits

The rear gearbox uses a short first gear ratio to amplify the electric motor's torque at low speeds, producing the powerful initial acceleration expected of a sports car. Porsche says this first gear is employed particularly in the Sport and Sport Plus drive modes and when using the system's Launch Control.

After the car reaches an appropriate speed the transmission shifts to a taller second gear. That longer ratio lets the motor operate at more suitable speeds for higher-velocity running, helping the Taycan maintain performance and reach a high top speed. Porsche specified an initial top speed of 260 km/h for the Taycan Turbo and Turbo S.

The two-speed unit is fitted to the rear axle only. In dual-motor, all-wheel-drive Taycan variants, the front axle carries its own motor and a single-speed transmission, so the two-speed arrangement applies only to the rear-drive gearbox and not to both axles.

Adding a second gear increases mechanical complexity, so Porsche has applied it where the performance benefits align with the vehicle's design goals: delivering both strong launches and robust high-speed behavior. For many electric vehicles a single gear remains sufficient because of the electric motor's broad operating range.