The 8-speed automatic transmission ZF 8HP90 has been produced by the German concern since 2009 and is installed on particularly powerful BMW and Rolls-Royce models under its GA8HP90Z index. The modification of this gearbox for Audi A8, RS6, RS7 has many differences and is known as 0BL.
1st generation of the 8HP family: 8HP45, 8HP55, 8HP70, 8HP90.
Specifications
| Production years | since 2009 |
| Type | automatic transmission |
| Number of gears | 8 |
| Type of drive | all wheel / rear |
| Engine volume, l | up to 6.4 |
| Torque output, Nm | up to 1000 |
| Recommended oil | ZF Lifeguard Fluid 8 |
| Oil capacity, liter | 8.8 |
| Replacing the oil | every 50,000 km |
| Replacing the filter | every 50,000 km |
| Gearbox lifespan, km | ~250 000 |
| Weight, kg | 94 (146 – Audi 0BL modification) |
Gear ratios ZF 8HP90
Using the example of a BMW 760Li 2014 with a 6.0 liter engine:
| Main | 2.813 |
| 1st | 4.714 |
| 2nd | 3.143 |
| 3rd | 2.106 |
| 4th | 1.667 |
| 5th | 1.285 |
| 6th | 1.000 |
| 7th | 0.839 |
| 8th | 0.667 |
| Reverse | 3.317 |
The transmission was installed on:
- Audi A6 C7 (4G) in 2013 – 2018;
- Audi A7 C7 (4G) in 2013 – 2018;
- Audi A8 D4 (4H) in 2009 – 2017;
- Bentley Continental GT 2 (3W) in 2011 – 2018;
- Bentley Flying Spur 2 (4W) in 2013 – 2019;
- Bentley Mulsanne 1 (3Y) in 2010 – 2020;
- BMW 7-Series F01 in 2009 – 2015;
- Dodge Challenger 3 (LC) since 2014;
- Dodge Charger 2 (LD) since 2014;
- Rolls-Royce Dawn 1 (RR6) in 2015 – 2022;
- Rolls-Royce Ghost 1 (RR4) in 2009 – 2020;
- Rolls-Royce Wraith 1 (RR5) in 2013 – 2022.
Disadvantages of the ZF 8HP90 gearbox
- This is a reliable and durable automatic transmission, but it comes with very powerful engines.
- From aggressive driving, the solenoids quickly become clogged with friction wear products.
- Wear of the torque converter clutches causes vibration and destruction of the oil pump bearing.
- With frequent acceleration, the aluminum parts of the mechanical part of the gearbox cannot withstand.
- Another weak point of the automatic transmission of this line is the rubber gaskets and bushings.
