| 4HP 20 · 4HP 22 · 4HP 24 4HP 14 · 4HP 16 · 4HP 18 | |
| Production: | 1980 – 2003 |
| Model Years: | 1980 – 2003 |
| Manufacturer: | ZF Friedrichshafen |
| Class: | 4-Speed Longitudinal and transverse Automatic Transmission |
| Predecessor: | ZF 3HP Transmission Family |
| Successor: | ZF 5HP Transmission Family |
The 4HP is a four-speed Automatic transmission family with a hydrodynamic Torque converter with an electronic hydraulic control for passenger cars from ZF Friedrichshafen AG. In selector level position "P", the output is locked mechanically. The Simpson planetary gearset types were first introduced in 1980, the Ravigneaux planetary gearset types in 1984 and produced through 2003 in different versions and were used in a large number of vehicles.
The 4HP 20 was introduced in 1995 and has been used in a variety of cars from Citroën, Lancia, Mercedes-Benz, Peugeot, and Renault.[1] The maximum torque capacity is 330Nm.
The 4HP 22 was produced for vehicles with rear wheel drive or 4X4 layout. Introduced in 1980, it was produced through 2003, and has been used in a variety of cars from BMW, General Motors, Jaguar, Land Rover, Maserati, Peugeot, Porsche, and Volvo.
The 4HP 24 was introduced in 1987 and was used in a variety of cars from Audi, BMW, Jaguar, and Land Rover.
The 4HP 14 was introduced in 1984 and produced through 2001 for Citroën, Peugeot, and Daewoo Front-wheel drive vehicles. The electronic-hydraulic control makes controlled power shifts and various shift programs possible.
The 4HP 16 is designed for use in vehicles with Front-wheel drive and a Transverse engine. The transmission is operated via selector lever and possibly also via switch. It has a controller slip Lock-up clutch.
The 4HP 18 is for both longitudinal and transverse installation. Introduced in 1987, and produced through 1998, it was used in a variety of cars from Alfa Romeo, Audi, Citroën, Dodge, Eagle, Fiat, Lancia, Porsche and Saab.
| Position | Value | German | Meaning | |
|---|---|---|---|---|
| 4HP 22FLE | 4 | Number of Gears | ||
| 4HP 22FLE | H | Hydraulische Kupplung | Hydraulic Clutch | |
| 4HP 22FLE | P | Planeten- radsätze | Planetary Gearsets | |
| 4HP 22FLE | Torque Class | |||
| 4HP 22FLE | F H | Front- motor Heck- motor | Front-Engine Design Rear-Engine Design | |
| 4HP 22FLE | L Q | Längs- motor Quer- motor | Longitudinal Engine Transverse Engine | |
| 4HP 22FLE | E A | Elektronische Steuerung Allrad- antrieb | Electronic Control Four-Wheel Drive | |
| Gear Teeth and Ratios | Planetary Gearset Teeth | Count | Total | Avg. | ||||
|---|---|---|---|---|---|---|---|---|
| Simpson | Simple | |||||||
| Model Type | Version First Delivery | S1 R1 | S2 R2 | S3 R3 | Brakes Clutches | Ratio Span | Gear Step | |
| Gear n | R | 1 | 2 | 3 | 4 | |||
| Step in-1/in | - R : 1 | 1 : 2 | 2 : 3 | 3 : 4 | ||||
| 4HP 22 Big Engines | 380Nm 1980 | 35 73 | 35 73 | 31 83 | 4 3 | |||
| Ratio in | -\tfrac{73}{35} | \tfrac{181}{73} | \tfrac{108}{73} | \tfrac{1}{1} | \tfrac{83}{114} | |||
| Step | 0.8412 | 1.6759 | 1.4795 | 1.3735 | ||||
| 4HP 22 Small Engines | 220Nm 1980 | 35 73 | 41 73 | 31 83 | 4 3 | |||
| Ratio in | -\tfrac{73}{35} | \tfrac{6,983}{2,555} | \tfrac{114}{73} | \tfrac{1}{1} | \tfrac{83}{114} | |||
| Step | 0.7631 | 1.7501 | 1.5616 | 1.3735 | ||||
| Ratio | -\tfrac{R1}{S1} | \tfrac{S1(S2+R2)+R1S2}{S1R2} | \tfrac{S2+R2}{R2} | \tfrac{1}{1} | \tfrac{R3}{S3+R3} | |||
| Gear Teeth and Ratios | Planetary Gearset Teeth Ravigneaux | Count | Total | Avg. | |||
|---|---|---|---|---|---|---|---|
| Model | Version First Delivery | {S1} {R1} | {S2} {R2} | Brakes Clutches | Ratio Span | Gear Step | |
| Gear | R | 1 | 2 | 3 | 4 | ||
| Step in-1/in | - R : 1 | 1 : 2 | 2 : 3 | 3 : 4 | |||
| 4HP 14 | 1984 | 34 29 | 29 82 | 2 3 | |||
| Ratio in | -\tfrac{82}{29} | \tfrac{41}{17} | \tfrac{861}{629} | \tfrac{1}{1} | \tfrac{82}{111} | ||
| Step | 1.1724 | 1.7619 | 1.3688 | 1.3537 | |||
| 4HP 18 | FLE 1991 | 38 34 | 34 98 | 2 3 | |||
| Ratio in | -\tfrac{49}{17} | \tfrac{49}{19} | \tfrac{294}{209} | \tfrac{1}{1} | \tfrac{49}{66} | ||
| Step | 1.1176 | 1.8333 | 1.4067 | 1.3469 | |||
| Ratio | -\tfrac{R2}{S2} | \tfrac{R1R2}{S1S2} | \tfrac{R2(S1+R1)}{S1(S2+R2)} | \tfrac{1}{1} | \tfrac{R2}{S2+R2} | ||
Front-engine design · Transverse engine · Front-wheel drive configuration[1]
Longitudinal engine design · Rear-wheel drive configuration[1]
Longitudinal engine design · Four-wheel drive configuration[1]
Rear-engine design · Longitudinal engine orientation · Rear-wheel drive configuration[1]
Longitudinal engine design · Rear-wheel drive configuration[1]
Longitudinal engine design · Four-wheel drive version[1]
Front-engine design · Longitudinal engine[1] [21]
Front-engine design · longitudinal engine · quattro Four-wheel drive[1]
Front-engine design · Longitudinal engine · (non-quattro)[1] [22]
Front-engine design · Transverse engine · Front-wheel drive[1]
Front-engine design · Transverse engine · Front-wheel drive[1]
Front-engine design · Transverse engine · Front-wheel drive[1]
