Audi R8 V10 7-speed DSG dual-clutch transmission PTX V10 V

Transmission Code: PTX

Part Number: 0BZ300045H (0BZ 300 045 H)

Generation: Type 42 Facelift (2013–2015)

Application: 5.2 FSI V10 / V10 Plus

The PTX is a 7-speed S-tronic dual-clutch transmission (0BZ family) specifically configured for the final evolution of the first-generation Audi R8 (Type 42). This code is synonymous with the V10 “Plus” and the high-output Spyder models from the 2013–2015 era. It replaced the previous R-tronic automated manual, offering a dual-clutch architecture that provides uninterrupted torque flow and significantly more refined low-speed drivability.

Technical Specifications

• Gearbox Architecture: DL800 (Audi internal designation 0BZ).

• Transmission Type: 7-Speed Dual-Clutch (Wet-Clutch DSG).

• Torque Capacity: Rated for $540\text{ Nm}+$; specifically tuned for the $8,700\text{ RPM}$ redline of the V10.

• Layout: Longitudinal mid-engine configuration with integrated rear differential and front-axle output.

• Weight: Approx. $120\text{ kg}$.

Key Features of the PTX Variant

• Optimized V10 Plus Ratios: The PTX code often features slightly more aggressive shift mapping compared to early DSG units, designed to compliment the $550\text{ PS}$ output of the V10 Plus.

• Dual-Path Cooling: Features an intensive oil-to-water heat exchanger system to maintain hydraulic stability even during repeated high-RPM shifts on track.

• Launch Control: Allows for optimized standing starts, enabling a $0\text{–}100\text{ km/h}$ time of roughly $3.5\text{ seconds}$.

• Integrated LSD: Includes a mechanical limited-slip rear differential within the transmission housing to manage the V10’s power exit from corners.

Professional Installation & Cataloging Notes

1. Component Protection: The PTX contains an internal Transmission Control Unit (TCU) that is part of the Audi Immobilizer network. After installation, the vehicle will enter “Limp Mode” (restricting gears) until Component Protection is removed via an authorized Audi ODIS online connection.

2. Fluid Requirements: The 0BZ system uses a split-sump design:

   • Hydraulic/Clutch Side: Requires G 052 529 A2 (S-tronic Fluid).

   • Gear/Differential Side: Requires G 052 145 S2 (75W90 Synthetic).

3. Basic Settings: Once the software handshake is complete, you must perform a “Basic Setting” of the clutches and shift actuators. This allows the TCU to calibrate the exact “kiss points” of the clutch packs for smooth engagement.

4. Hinge & Mount Inspection: When swapping a PTX unit, inspect the transmission mounts (420399151L). Given the age of Type 42 vehicles, the rubber mounts often perish, leading to drivetrain “thudding” during aggressive downshifts.

Inventory Note: The PTX is technically a successor/alternative to the PKL and NXZ codes. While mechanically similar, always confirm the software compatibility if retrofitting into an earlier 2013 model.