| 4HP 20 · 4HP 22 · 4HP 24 4HP 14 · 4HP 16 · 4HP 18 | |
|---|---|
| Overview | |
| Manufacturer | ZF Friedrichshafen |
| Production | 1980 – 2003 |
| Model years | 1980 – 2003 |
| Body and chassis | |
| Class | 4-Speed Longitudinal and transverse Automatic Transmission |
| Chronology | |
| Predecessor | ZF 3HP Transmission Family |
| Successor | ZF 5HP Transmission Family |
The 4HP is a 4-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.
Gear Model
|
R | 1 | 2 | 3 | 4 | Total Span |
Span Center |
Avg. Step |
Compo- nents | |
|---|---|---|---|---|---|---|---|---|---|---|
| 4HP 22 Large Engines |
−2.086 | 2.479 | 1.479 | 1.000 | 0.728 | 3.406 | 1.344 | 1.505 | 3 Gearsets 4 Brakes 3 Clutches | |
| 4HP 22 Small Engines |
−2.086 | 2.733 | 1.562 | 1.000 | 0.728 | 3.754 | 1.411 | 1.554 | ||
| 4HP 14 1984 |
−2.828 | 2.412 | 1.369 | 1.000 | 0.739 | 3.265 | 1.335 | 1.483 | 2 Gearsets 2 Brakes 3 Clutches | |
| 4HP 18 1991 |
−2.882 | 2.579 | 1.407 | 1.000 | 0.742 | 3.474 | 1.384 | 1.514 | ||