ASTON MARTIN DB11 4.0 V8 gearbox

For the Aston Martin DB11 4.0 V8 (produced from 2017 to 2023), the gearbox is a high-performance 8-speed automatic transaxle manufactured by ZF Friedrichshafen.

While the engine is sourced from Mercedes-AMG, the gearbox is the renowned ZF 8HP series, specifically tuned by Aston Martin engineers to suit the “Grand Tourer” character of the DB11.

Technical Specifications

• Model: ZF 8HP75 (8-speed automatic).

• Layout: Rear mid-mounted transaxle. It is connected to the front-mounted V8 engine via a lightweight carbon fiber propeller shaft housed inside a cast aluminum torque tube.

• Torque Capacity: The “75” in the model name indicates a torque handling capacity of up to 750 Nm, easily managing the V8’s 675 Nm output.

• Differential: Integrated mechanical limited-slip differential with electronic torque vectoring (using the brakes to help the car rotate through corners).

Key Features

• Shift Logic: Unlike the “Sportshift” automated manuals in older Vantages, this is a traditional torque-converter automatic. It offers seamless shifts in “GT” mode but becomes significantly sharper and more aggressive in “Sport” and “Sport Plus” modes.

• Shift-by-Wire: There is no physical linkage between the gear selector and the gearbox; shifts are commanded electronically via the dash-mounted glass buttons (P, R, N, D) or the steering-column-mounted magnesium paddles.

• Weight Distribution: By mounting the gearbox at the rear, Aston Martin achieved a near-perfect weight distribution (approximately 49% front / 51% rear), which is superior to the heavier V12 model.

Maintenance & Service

• Fluid Type: ZF Lifeguard Fluid 8.

• Service Interval: While often labeled as “filled for life” by manufacturers, ZF (the gearbox builder) generally recommends an oil and filter change every 60,000 to 80,000 km (approx. 50,000 miles) or every 8 years to maintain shift quality.

• Filter: The filter is integrated into the plastic transmission oil pan, so the entire pan is typically replaced during a major service.

Quick Comparison: V8 vs. V12 Gearbox

While both use the 8-speed ZF unit, the V8 gearbox has a shorter final drive ratio compared to the V12. This was done to make the V8 feel more “punchy” and responsive at lower speeds, compensating for the lower cylinder count.