The 6-speed automatic transmission ZF 6HP28 was produced by the concern from 2007 to 2014 and was installed on rear-wheel drive or all-wheel drive BMW models under the designations GA6HP28Z and GA6HP28X. A modification of such an automatic transmission for Audi is known as 0B6 or 6HP28A and has many differences.
6HP family: 6HP19, 6HP26, 6HP32, 6HP21, 6HP28.
Specifications
| Production years | 2007 – 2014 |
| Type | automatic transmission |
| Number of gears | 6 |
| Type of drive | all wheel / rear |
| Engine volume, l | up to 6.2 |
| Torque output, Nm | up to 700 |
| Recommended oil | ZF Lifeguard Fluid 6 |
| Oil capacity, liter | 9.5 |
| Replacing the oil | every 60,000 km |
| Replacing the filter | every 60,000 km |
| Gearbox lifespan, km | ~300 000 |
| Weight, kg | 90 (Audi 0B6 – 136) |
Gear ratios ZF 6HP28
Using the example of a BMW 750i 2009 with a 4.4 liter engine:
| Main | 3.462 |
| 1st | 4.171 |
| 2nd | 2.340 |
| 3rd | 1.521 |
| 4th | 1.143 |
| 5th | 0.867 |
| 6th | 0.691 |
| Reverse | 3.403 |
The transmission was installed on:
- Audi A4 B8 (8K) in 2007 – 2011;
- Audi A5 1 (8T) in 2007 – 2011;
- Audi Q5 1 (8R) in 2008 – 2012;
- BMW 3-Series E90 in 2008 – 2013;
- BMW 5-Series E60 in 2007 – 2010;
- BMW 7-Series F01 in 2008 – 2012;
- BMW X3-Series E83 in 2008 – 2010;
- BMW X5-Series E70 in 2008 – 2013;
- BMW X6-Series E71 in 2008 – 2014;
- Jaguar XF 1 (X250) in 2009 – 2012;
- Jaguar XK 2 (X150) in 2009 – 2014;
- Jaguar XJ 8 (X351) in 2009 – 2013;
- Land Rover Discovery 4 (L319) in 2009 – 2013;
- Land Rover Range Rover 3 (L322) in 2009 – 2012;
- Land Rover Range Rover Sport 1 (L320) in 2009 – 2013.
Disadvantages of the ZF 6HP28 gearbox
- The main problems of the gearbox are related to the rapid wear of the torque converter lock-up clutch;
- The solenoids of the valve body become clogged with wear products and the automatic transmission begins to push;
- Ignoring shocks and vibrations leads to destruction of the oil pump bearing;
- The weak points of automatic transmissions of this family include short-lived metal bushings;
- Also, all rubber and plastic parts do not have the greatest resource.
