BENTLEY BENTAYGA 36A 6.0 TSI W12 GEARBOX 8HP95A SHY

Bentley Bentayga 6.0 TSI W12 Gearbox

Series: 36A (First Generation: 2016–2020) Transmission Model: ZF 8-Speed Automatic (8HP95A) Gearbox Code: SHY (and variants like SHT or RWH)

For the first-generation Bentley Bentayga W12, the drivetrain utilizes the heavy-duty ZF 8HP95A transmission. This is a specialized version of ZF’s 8-speed torque-converter automatic, engineered specifically to handle the massive 900 Nm (664 lb-ft) of torque produced by the 6.0L twin-turbo W12 engine.

1. Technical Specifications

• Manufacturer: ZF Friedrichshafen (Germany).

• Torque Capacity: Rated for up to 1000 Nm, making the 8HP95 one of the strongest passenger car automatics in the world.

• Drive System: Permanent All-Wheel Drive with a Torsen self-locking center differential.

• Torque Split: Asymmetric 40:60 (front-to-rear) under normal driving conditions.

• Shift Performance: Features “lock-up” in all eight gears to eliminate slip and maximize the massive low-end torque of the W12 TSI.

2. Identification & Codes

When sourcing a replacement or servicing the unit, you will encounter these specific identifiers:

• Gearbox Code SHY: This is the factory-specific three-letter code for the W12 transmission calibration used in earlier Bentayga production runs.

• Alternative Codes: Depending on the production year and software revision, you may also see codes like SHT or RWH.

• VAG Group Type: Often referred to in technical manuals as the 0D6 transmission family.

3. Service & Maintenance

Despite being marketed as “filled-for-life” by some dealerships, ZF (the manufacturer) recommends regular maintenance for this high-torque application:

• Service Interval: Recommended every 50,000 to 60,000 miles (80,000 km) or 8 years.

• Fluid Type: Requires ZF Lifeguard Fluid 8 (specifically for the 8-speed range).

• Filter: The transmission filter is integrated into the plastic oil pan (sump). When servicing, the entire pan must be replaced.

  • Service Kit Part Number: Typically involves a kit like 36A198115.

4. Replacement Note (Programming)

If you are replacing the SHY gearbox with a used or new unit:

• Immobilizer / Component Protection: The Transmission Control Unit (TCU) is located inside the gearbox. It is electronically locked to the vehicle’s VIN.

• Unlocking: A new or used unit will require an online “GeKo” connection via Bentley ODIS software to pair it with the engine’s ECU and the vehicle’s security system. Without this, the car will not engage any gears.

Wheel Compatibility Link

Since you previously asked about the 36A601025D wheel:

• This wheel is the standard 22-inch fitment for the Bentayga W12 that uses this SHY gearbox.

• Torque Spec: When remounting these wheels to a W12 Bentayga, the lug bolt torque is 180 Nm (133 lb-ft).