ZF 3HP transmission
| 3HP 12 · 3HP 22 | |
|---|---|
| Overview | |
| Manufacturer | ZF Friedrichshafen |
| Production | 1963–1975 · 1973–1990 |
| Model years | 1963–1975 · 1973–1990 |
| Body and chassis | |
| Class | 3-Speed Automatic Transmission for Longitudinal and Transverse Engines |
| Chronology | |
| Successor | ZF 4HP transmission Family |
The 3HP is a 3-speed Automatic transmission family with a hydrodynamic Torque converter with hydraulic control for passenger cars from ZF Friedrichshafen AG. In selector level position "P", the output is locked mechanically. The Ravigneaux planetary gearset types were first introduced in 1963 and produced through the mid seventies. The Simpson planetary gearset types were launched in 1973 and produced through 1990. Both were used in different versions in a large number of cars.
Gear Model |
R | 1 | 2 | 3 | Total Span |
Span Center |
Avg. Step |
Compo- nents | |
|---|---|---|---|---|---|---|---|---|---|
| 3HP 12 Small Engines |
−2.000 | 2.560 | 1.520 | 1.000 | 2.560 | 1.600 | 1.600 | 2 Gearsets 3 Brakes 2 Clutches | |
| 3HP 12 Big Engines |
−2.000 | 2.286 | 1.429 | 1.000 | 2.286 | 1.512 | 1.512 | ||
| 3HP 22 Big Engines |
−2.086 | 2.479 | 1.479 | 1.000 | 2.479 | 1.575 | 1.575 | 2 Gearsets 3 Brakes 2 Clutches | |
| 3HP 22 Small Engines |
−2.086 | 2.733 | 1.562 | 1.000 | 2.733 | 1.653 | 1.653 | ||
| 3HP 22 Porsche 944 |
−2.429 | 2.714 | 1.500 | 1.000 | 2.714 | 1.648 | 1.648 | ||
- ↑ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage