The Aston Martin DBS Superleggera (AM7), produced between 2018 and 2024, utilizes a rear-mounted 8-speed automatic transaxle. While the car features a massive 5.2L twin-turbo V12, the gearbox is the heavy-duty ZF 8HP95.

This is a significant upgrade over the 8HP75 found in the standard DB11, as it was specifically chosen to handle the DBS’s immense torque output of 900 Nm (664 lb-ft).

Technical Specifications

• Model: ZF 8HP95 (2nd Generation).

• Layout: Rear-mounted transaxle for optimal weight distribution (~51% rear).

• Torque Capacity: Rated for up to 1,000 Nm, providing a safety margin over the V12’s output.

• Final Drive Ratio: 2.93:1 (Shorter/taller numerically than the DB11’s 2.70:1, allowing for more explosive in-gear acceleration).

• Driveshaft: Connected to the engine via a carbon fiber propeller shaft inside an alloy torque tube.

Part Numbers & Identification

If you are sourcing a replacement or checking compatibility, the primary Aston Martin OEM part numbers are:

• Transmission Assembly: KY73-70041-AB (General DBS Superleggera spec).

• Transmission Oil Pan/Filter: KY73-6D635-AA (The filter is built into the pan).

• Mounting: JY53-6068-AA (Left-hand gearbox mount).

Key Maintenance Details

• Fluid Type: ZF Lifeguard Fluid 8 (Greenish/Blue tint).

• Service Requirement: While official intervals are long, specialists recommend changing the fluid and the integrated filter pan every 60,000 km (approx. 37,000 miles) to ensure the mechatronic unit remains clear of debris.

• Capacity: Approximately 8.8 to 9.0 liters for a dry fill, though a standard service drain usually requires 5–6 liters.

Performance Tuning

The DBS Superleggera’s gearbox software is tuned to be significantly more aggressive than other AM models. In Sport+ mode, it features “Slam-shifts” that prioritize speed and engagement, whereas GT mode utilizes the torque converter’s characteristics for seamless, almost imperceptible gear changes.