ASTON MARTIN DB9 COUPE gearbox

Aston Martin DB9 (2004–2016) utilized two primary transmission types throughout its production run, both mounted as a rear transaxle for a near-perfect 50:50 weight distribution.

1. Touchtronic II (6-Speed Automatic)

The vast majority of DB9s are equipped with the ZF 6HP26 6-speed automatic. While the internal components are shared with BMW and Jaguar, the aluminum casing is a bespoke Aston Martin structural component.

• Years: 2004–2014.

   

• Shift Method: Glass “PRND” buttons on the dash and magnesium paddles on the steering column.

• Evolution: * Early (2004–2008): Slower shift logic; rated for 450 hp.

  • Facelift (2009–2014): Updated electronics (prefix 8G43) and software for 30% faster shifts to match the 470 hp power bump.

• Common Issue: The electrical connector sleeve often leaks oil. In 2026, it is highly recommended to replace this sleeve during every fluid service (every 50k miles) to prevent oil from damaging the wiring harness.

2. Manual (6-Speed Graziano)

A rare and highly collectible option, the manual DB9 uses a 6-speed unit manufactured by Graziano.

• Years: 2004–2012 (Dropped for the final 2013+ facelift).

• Rarity: Less than 5% of total DB9 production was manual.

   

• Performance: Features a lighter flywheel than the automatic, allowing the V12 to rev more freely.

   

• Known Quirk: The shifter can feel “balky” when cold. Using high-quality synthetic gear oil (yellow-metal safe) significantly improves cold-shift quality.

3. Touchtronic III (8-Speed Automatic)

For the final production years of the “AM11” engine generation, Aston upgraded the DB9 to the world-class ZF 8HP70.

• Years: Late 2014–2016 (primarily in the DB9 GT).

• Benefits: Significantly better fuel economy and much faster, smoother shifts than the 6-speed. It transformed the DB9’s performance in its final years.

Maintenance & Replacement Costs (2026 Estimates)

The “No Reverse” or “Gearbox Fault” Warning

On the 6-speed Touchtronic models, a common fault in 2026 is a failing Mechatronic Unit (the internal computer/valve body).

• The Fix: Instead of a $10k gearbox, you can often buy a remanufactured Mechatronic for $1,500 – $2,500.

• Warning: If the car is stuck in Park, there is a Manual Park Release Cable located under the leather trim in the center armrest storage area that allows you to roll the car for towing.