ZF 4HP18 transmission
The ZF 4HP18 is a four-speed automatic transmission for passenger cars from ZF Friedrichshafen AG for both longitudinal and transverse installation, identifiable by the suffix Q (german quer = transverse). Introduced in 1987, and produced through 1998, it was used in a variety of cars from Alfa Romeo, Audi, Citroën, Dodge, Eagle, Fiat, Lancia, and Saab.
| 4HP 18 (FWD & RWD & 4x4) | |
|---|---|
| Overview | |
| Manufacturer | ZF Friedrichshafen |
| Production | 1987 – 1998 |
| Model years | 1987 – 1998 |
| Body and chassis | |
| Class | 4-Speed transverse and Longitudinal Automatic Transmission |
| Chronology | |
| Predecessor | ZF 3HP Transmission Family |
| Successor | ZF 5HP Transmission Family |
Specifications
Technical data
| Gear Teeth
and Ratios |
Ravigneaux planetary gearset:
Teeth |
Count | Total | Avg. | ||
|---|---|---|---|---|---|---|
| Model | Version
First Delivery |
Sun 1.1
Ring 1.1 |
Sun 1.2
Ring 1.2 |
Brakes
Clutches |
Ratio
Span |
Gear
Step |
| Gear | R | 1 | 2 | 3 | 4 | |
| 4HP 14 | 1987 | 29[lower-alpha 1]
82 |
34
29 |
2
3 |
3.2647 | 1.4835 |
| Ratio | - 2.8376 | 2.4118 | 1.3688 | 1.0000 | 0.7387 | |
| 4HP 18 | FLE
1991 |
34[lower-alpha 1]
98 |
38
34 |
2
3 |
3.4737 | 1.5145 |
| Ratio | - 2.8824 | 2.5789 | 1.4067 | 1.0000 | 0.7424 | |
- inner and outer sun gear of the Ravigneaux planetary gearset are inverted
Applications
4HP18FL
front wheel drive longitudinal engine
- 1988–1992 Renault 25 V6 2.8
- 1988–1992 Eagle Premier/Dodge Monaco V6 3.0
4HP18FLA (Audi Quattro 4x4)
Audi version: longitudinal engine, quattro four-wheel drive
4HP18FLE (Audi FWD)
longitudinal engine, (non-quattro)
4HP18Q
front wheel drive transverse engine
- 1987–1989 Fiat 2000 2.0
- 1987–1989 Fiat 2500 2.5
- 1987–1998 Saab 9000
- 1989–1993 Alfa Romeo 164 V6 3.0
- 1989–1998 Citroën XM 2.0
- 1989–1998 Citroën XM V6 3.0
- 1989–1994 Fiat Croma 2.0
- 1989–1994 Lancia Thema 2.0
- 1989–1992 Lancia Thema V6 3.0
- 1989–1999 Peugeot 605 2.0
- 1989–1999 Peugeot 605 V6 3.0
4HP18QE
front wheel drive transverse engine
- 1993–1997 Alfa Romeo 164 V6 3.0
- 1993–1994 Lancia Thema V6 3.0
See also
References
- "ZF North America Application Chart (automatic)" (PDF). ZF-Group.com. Archived from the original (PDF) on 4 January 2006. Retrieved 11 February 2006.
- 4HP18 FLA Transmission filter : https://www.allomatic.com/transmission-filters/515426
- Transmissions Parts catalogue : https://global-uploads.webflow.com/5d4ad27f935075baaeb45f60/5fb67c61d98f56954b343a33_2020.11.18%20APC%20Catalog%20without%20images.pdf
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