The 4-speed automatic transmission ZF 4HP24 was produced at a plant in Germany from 1986 to 2004 and was installed on many rear-wheel drive or all-wheel drive models from BMW, Jaguar and Range Rover. This automatic transmission was also installed on front-wheel drive and all-wheel drive Audi under the designations 4HP24A and 4HP24FLA.
4HP family: 4HP14, 4HP16, 4HP18, 4HP20, 4HP22, 4HP24.
Specifications
| Production years | 1986 – 2004 |
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | front / all wheel / rear |
| Engine volume, l | up to 5.0 |
| Torque output, Nm | up to 450 |
| Recommended oil | Dexron III |
| Oil capacity, liter | 9.5 |
| Replacing the oil | every 60,000 km |
| Replacing the filter | every 60,000 km |
| Gearbox lifespan, km | ~400 000 |
| Weight, kg | 89 (4HP24A – 116) |
In 1986, the German company ZF introduced a new 4-speed automatic transmission designed for rear-wheel drive and all-wheel drive models with powerful V8 engines up to 450 Nm. In 1988, on the basis of this automatic transmission, an automatic transmission was developed for front- and all-wheel drive Audi models, which became known under the designations 4HP24A or 4HP24FLA on Quattro modifications.
Gear ratios ZF 4HP24
Using the example of a Range Rover 1999 with a 4.6 liter engine:
| Main | 4.3 |
| 1st | 2.479 |
| 2nd | 1.479 |
| 3rd | 1.000 |
| 4th | 0.728 |
| Reverse | 2.086 |
The transmission was installed on:
- Audi A8 D2 (4D) in 1994 – 1996;
- Audi S6 C4 (4A) in 1994 – 1997;
- Audi V8 D1 (4C) in 1988 – 1994;
- BMW 7-Series E32 in 1986 – 1994;
- BMW 8-Series E31 in 1990 – 1994;
- Jaguar XJ 4 (XJ40) in 1986 – 1994; XJ 5 (X300) in 1994 – 1997;
- Land Rover Discovery 2 (L318) in 2002 – 2004;
- Land Rover Range Rover 2 (P38A) in 1994 – 2002.
Disadvantages of the ZF 4HP24 gearbox
- This is a reliable and durable automatic transmission and its service life depends only on your driving style. Problems here begin after critical wear of the torque converter clutch, which causes vibrations that cause the pump bushing to break and leaks to begin.
- Also, the wear products of the torque converter clutch clog the solenoids and channels in the valve body, and then there are delays when shifting gears, various shocks or jerks.
- It should also be noted that the electronics often put the gearbox into emergency mode not through its fault, but due to malfunctions in the engine control unit or ABS sensors.
