// Workers AI · dad joke modeDoes the ZF 4HP transmission go to therapy? It's struggling to shift emotions.

4HP 22 · 4HP 24
4HP 14 · 4HP 18
4HP 16 · 4HP 20
4HP 22 · 4HP 24; 4HP 14 · 4HP 18; 4HP 16 · 4HP 20
Overview
Manufacturer	ZF Friedrichshafen
Production	1980 – 2010
Model years	1980 – 2010
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 from ZF with a hydrodynamic torque converter and with a hydraulic or electronic control for passenger cars. The Simpson planetary gearset types were first introduced in 1980, the Ravigneaux planetary gearset types in 1984 and were produced through 2003 in different versions and were used in a large number of vehicles. In 1995, a Simpson planetary gearset type with a much more compact design was introduced. These transmissions were available until 2010.

Key data

Gear ratios^[a]
Model	First Deliv- ery	Gear					Total Span			Avg. Step	Components		Nomenclature
Model	First Deliv- ery	R	1	2	3	4	Nomi- nal	Effec- tive	Cen- ter	Avg. Step	Total	per Gear^[b]	Gears Count	Cou- pling	Gear- sets	Input Shaft Diameter

Simpson planetary gearset types with 3 planetary gearsets													4^[b]	H^[c]	P^[d]
4HP 22 Large Engines	1980	−2.086	2.479	1.479	1.000	0.728	3.406	2.865	1.344	1.505	3 Gearsets 4 Brakes 3 Clutches	2.500				22 mm
4HP 22 Small Engines	1980	−2.086	2.733	1.562	1.000	0.728	3.754	2.865	1.411	1.554	3 Gearsets 4 Brakes 3 Clutches	2.500				22 mm
Ravigneaux planetary gearset types with 2 planetary gearsets combined in 1 compound planetary gearset
4HP 14	1984	−2.828	2.412	1.369	1.000	0.739	3.265	3.265	1.335	1.483	2 Gearsets 2 Brakes 3 Clutches	1.750				14 mm
4HP 18	1987	−2.882	2.579	1.407	1.000	0.742	3.474	3.474	1.384	1.514	2 Gearsets 2 Brakes 3 Clutches	1.750				18 mm
Simpson planetary gearset types with 2 planetary gearsets
4HP 16	2004	−2.529	2.719	1.487	1.000	0.717	3.795	3.529	1.396	1.560	2 Gearsets 2 Brakes 3 Clutches	1.750				16 mm
4HP 20	1995	−2.568	2.718	1.481	1.000	0.720	3.776	3.568	1.399	1.557	2 Gearsets 2 Brakes 3 Clutches	1.750				20 mm

↑ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage 1 2 Forward gears only ↑ Hydraulic torque converter · German: Hydraulischer Wandler oder Drehmomentwandler ↑ Planetary gearing · German: Planetenradsätze

Nomenclature
Position	Value	Meaning

4HP 22FLE	4	Number of gears
4HP 22FLE	H	Hydraulic converter German: Hydraulischer Wandler
4HP 22FLE	P	Planetary gearsets German: Planetenradsätze
4HP 22FLE		Torque rating^[a]
4HP 22FLE	F H	Front-engine · German: Frontmotor Rear-engine · German: Heckmotor
4HP 22FLE	L Q	Longitudinal engine · German: Längsmotor Transverse engine · German: Quermotor
4HP 22FLE	E A	Electronic control · German: Elektronische Steuerung Four-wheel drive · German: Allradantrieb

↑ 3HP to 6HP: specified indirectly via the input shaft diameter 8HP to 9HP: specified directly

1980: Simpson planetary gearset types
— first design with 3 planetary gearsets —

Design

The 1979 oil crisis, as the second one after the 1973 oil crisis, called for a swift response. In 1980 ZF came up with a four-speed version by simply adding a 3rd planetary gearset, which is placed behind the original 3HP gearsets from 1973. This makes the transmission complex and costly to manufacture, long, and bulky, so it is only suitable for longitudinal installation.

4HP 22

Rear-wheel drive configuration.^[1] It 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.

4HP 22EH

Four-wheel drive configuration^[1] · Electronic control

4HP 22HL

Rear-engine design · Rear-wheel drive configuration^[1]

4HP 24

Rear-wheel drive configuration.^[1] It was introduced in 1987 and was used in a variety of cars from Audi, BMW, Jaguar, and Land Rover.

4HP 24A

Four-wheel drive version^[1]

1984: Ravigneaux planetary gearset types
— design with 2 planetary gearsets combined in 1 compound planetary gearset —

Design

The overdrive is provided by an additional shift element, which is integrated in the original 3HP gearsets from 1963. This keeps the design compact, so it is suitable for different transmission models either for longitudinal or transverse installation.

4HP 14

Front-engine design. It was introduced in 1984 and produced through 2001 for Citroën, Peugeot, and Daewoo Front-wheel drive vehicles. The electronic control makes controlled power shifts and various shift programs possible.

4HP 18

Designed for both longitudinal and transverse installation. It was 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.

4HP 18FL

Front-engine design · Longitudinal engine^[1]^[2]

4HP 18FLA

Front-engine design · longitudinal engine · quattro Four-wheel drive.^[1] Audi Quattro 4x4

4HP 18FLE

Front-engine design · Longitudinal engine · Electronic control · Audi FWD, non-quattro^[1]^[3]

1995: Simpson planetary gearset types
— second design with 2 planetary gearsets —

Design

In 1995, a new design made 4-speed transmissions in a Simpson planetary gearset layout without an additional planetary gearset possible, so the overdrive is provided by an additional shift element, which is integrated in the original 3HP gearsets from 1973. This keeps the design compact, so it is suitable for different transmission models either for longitudinal or transverse installation.

All models have an electronic control.

4HP 16

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.

4HP 20

Front-engine design · Transverse engine · Front-wheel drive configuration.^[1] It was introduced in 1995 and has been used in a variety of cars from Citroën, Lancia, Mercedes-Benz, Peugeot, and Renault. The maximum torque capacity is 330 N⋅m (243 lb⋅ft).

Applications

Variants and applications
Model	Car Model^[a]

1980: Simpson planetary gearset types with 3 planetary gearsets
4HP 22	1984–1988 BMW E30 316 M10/B18 1987–1988 BMW E30 316i M10/B18 1988–1994 BMW E30 316i M40/B16 1984–1987 BMW E30 318i M10/B18 1987–1994 BMW E30 318i M40/B18 1982–1993 BMW E30 320i M20/B20 1982–1986 BMW E30 323i M20/B23 1985–1990 BMW E30 324d M21/D24 1987–1990 BMW E30 324td M21/D24 1983–1988 BMW E30 325e M20/B27:^[4] Type A 1985–1993 BMW E30 325i M20/B25:^[4] Type A 1986–1992 BMW E30 325ix M20/B25:^[4] Type A 1981–1987 BMW E28 518i M10/B18:^[5] Type B 1981–1987 BMW E28 520i M20/B20:^[5] Type B 1986–1988 BMW E28 524d M21/D24:^[5] Type B 1983–1987 BMW E28 524td M21/D24:^[5] Type B 1983–1988 BMW E28 525e M20/B27:^[5] Type A 1981–1987 BMW E28 525i M30/B25:^[5] Type A 1981–1987 BMW E28 528e M20/B27 1981–1987 BMW E28 528i M30/B28:^[5] Type A 1983–1984 BMW E28 533i M30/B32 1984–1988 BMW E28 535i M30/B34:^[5] Type A 1983–1989 BMW E24 633CSi M30/B32 1983–1987 BMW E24 635CSi M30/B34 1983–1984 BMW E23 733i M30/B32 1984–1987 BMW E23 735i M30/B34:^[6] Type A 1984–1987 BMW E23 745i (South African version) M88/3:^[7] Type A 1988–1992 BMW E34 520i M20/B20: Type A 1988–1992 BMW E34 524td M21/D24:^[8] Type B 1988–1990 BMW E34 525i M20/B25: Type A 1988–1992 BMW E34 530i M30/B30: Type A 1988–1993 BMW E34 535i M30/B35:^[8] Type A 1986–1994 BMW E32 730i M30/B30:^[9] Type A 1986–1992 BMW E32 735i M30/B35:^[9] Type A 1986–1992 BMW E32 735iL M30/B35:^[9] Type A 1988–1992 Chevrolet Opala 2.5 (151):^[10]^[11] Type A 1988–1992 Chevrolet Opala 4.1 (250):^[10]^[11] Type A 1987–1993 Jaguar XJ40 3.6 1994–1997 Jaguar X300 3.2 1987–1991 Jaguar XJS 3.6 1997 Land Rover Defender 90 V8 4.0 L North America Spec 1998 Land Rover Defender 90 V8 4.0 L Defender 50th Special Edition 1992–1999 Land Rover Discovery (Series I) V8 3.9 L 1999–2002 Land Rover Discovery (Series II) V8 4.0 L 1987–2002 Range Rover (except 4.6 L) 1984–1985 Lincoln Continental 2.4 L (BMW-Steyr turbodiesel) 1986–1991 Lotus Excel SA Twin Cam 4 Cyl Lotus 2.2 L 180 bhp 1988–1997 Maserati Biturbo 2.5 V6 1988–1997 Maserati Biturbo 2.8 V6 1994–1998 Maserati Quattroporte IV 2.8 V6 1986–1997 Peugeot 505 2.0 (XN^[12]^[13]^[14]): Type A 1986–1997 Peugeot 505 2.0 (ZEJ^[12]^[14]): Type A 1986–1997 Peugeot 505 2.2 (N9T^[14]): Type A 1986–1997 Peugeot 505 2.2 (ZDJ^[12]^[13]^[14]^[15]): Type A 1986–1997 Peugeot 505 2.5 (XD3^[13]^[16]): Type A 1986–1997 Peugeot 505 2.8 (ZN3J^[14]): Type A 1987–1989 Peugeot 604 2.5 1984–1985 Volvo 740 GL, GLE 2.3 (non turbo) B230F:^[17] Type B 1986– Volvo 740 GL, GLE 2.3 (non turbo) B230F:^[18] Type A 1984–1987 Volvo 740 2.4 L Turbo-Diesel D24T^[19] 1986–1991 Volvo 760 2.3 L 1985–1989 Volvo 760 2.3 Turbo B230ET 1983–1989 Volvo 760 GLE 2.4 Turbo-Diesel D24T/D24TIC^[20] 1990–1994 Volvo 940 2.3 (non turbo, Europe & Australia) B230FB 1990–1998 Volvo 940 2.4 L Turbo-Diesel D24TIC
4HP 22EH	1999–2004 Land Rover Discovery (Series II) TD5 Diesel
4HP 22HL	1989–1993 Porsche 911 Carrera II 3.6 1993–1998 Porsche 993 3.6
4HP 24	1986–1994 BMW E32 750i M70/B50 1986–1994 BMW E32 750iL M70/B50 1986–1994 Jaguar XJ40 1989–1994 BMW E31 850Ci M70/B50 1989–1994 BMW E31 850i M70/B50 1989–1996 Jaguar XJS 4.0 1995–1997 Jaguar XJ6 (X300) 4.0 1994–2002 Range Rover V8 4.6 L 1999–2002 Range Rover V8 4.0 L 2003–2004 Land Rover Discovery V8 4.6 L
4HP 24A	1990–1991 Audi V8 3.6 V8 1992–1994 Audi V8 4.2 V8 1994–1996 Audi D2 A8 4.2 V8 quattro 1995–1997 Audi S6 4.2 V8 C4 100
1984: Ravigneaux planetary gearset types with 2 planetary gearsets combined in 1 compound planetary gearset
4HP 14	1984–1993 Citroën BX 1.6 1985–1993 Citroën BX 1.9 1987–1993 Peugeot 205 1.6 1987–1993 Peugeot 205 1.9 1987–1989 Peugeot 305 1.5 1987–1996 Peugeot 309 1.6^[21] 1987–1996 Peugeot 309 1.9 1987–1997 Peugeot 405 1.6 1987–1997 Peugeot 405 1.8 1987–1997 Peugeot 405 1.9 1990–1996 Volvo 400 series^[22] 1991–1998 Rover 800 (XX/R17) 1992–1993 Citroën ZX 1.6 1992–1998 Citroën ZX 1.8 1993–1998 Citroën Xantia 1.8 1993–1998 Citroën Xantia 2.0 1993–2001 Peugeot 306 1.8 1993–2001 Peugeot 306 2.0 1996–1997 Daewoo Nubira 1.5 1996–1997 Daewoo Nubira 1.8 1996–1997 Daewoo Leganza 1.8 1996–1997 Daewoo Leganza 2.0
4HP 18FL	1988–1992 Renault 25 V6 2.8 1988–1992 Eagle Premier/Dodge Monaco V6 3.0
4HP 18FLA^[b]	1992–1994 Audi S4 (C4) 5-cyl 2.2 Turbo 1992–1994 Audi 100 (C4) CS 2.8 V6 1995–1997 Audi A6 (C4) quattro 2.8 V6 1995–1997 Audi S6 (C4) quattro 5-cyl 2.2 Turbo
4HP 18FLE^[c]	1991–1994 Porsche 968 4-cyl 3.0 1992–1993 Audi 100 2.8 V6 1992–1994 Audi 100 CS 2.8 V6 1992–1994 Audi 100 S 2.8 V6 1995–1997 Audi A6 2.8 V6 1995–1997 Audi A6 2.5 TDI (AEL) (AAT)
4HP 18Q	1987–1989 Fiat Croma 2.0 1987–1989 Fiat Croma 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
4HP 18QE	1993–1997 Alfa Romeo 164 V6 3.0 1993–1994 Lancia Thema V6 3.0
4HP 18EH	1994–1998 Lancia Kappa V6 3.0
1995: Simpson planetary gearset types with 2 planetary gearsets
4HP 16	2004–2008 Suzuki Reno 2.0L 4L 2004–2008 Suzuki Forenza 2.0L 4L 2004–2006 Suzuki Verona 2.0L 4L
4HP 20	1996–2004 Peugeot 406 V6 3.0 1996–2003 Mercedes-Benz Vito 1996–2003 Mercedes-Benz V-Class 1997–2001 Citroën Xantia V6 2.9 1997–2001 Citroën XM V6 2.9 1997–1999 Peugeot 605 V6 2.9 1998–2002 Alfa Romeo 166 V6 2.5, V6 3.0 1998–2005 Lancia Kappa, Phedra V6 3.0 1998–2008 Renault Laguna 3.0 1998–2002 Renault Espace V6 3.0 1999–2000 Renault Safrane V6 3.0 24V 2001–2008 Citroën C5 and Citroën C8 V6 2.9, Peugeot 807 V6 2.9 and Peugeot 607 with DW12 2.2 HDi 2004–2010 Peugeot 407 with DW12 2.2 HDi 2003–2006 Fiat Ducato 2.8 JTD (244 Series)

↑ without any claim of completeness ↑ Audi Quattro 4x4 ↑ Audi FWD

References

1 2 3 4 5 6 7 8 9 10 11 12 "ZF North America Application Chart (automatic)" (PDF). ZF-Group.com. Archived from the original (PDF) on 4 January 2006. Retrieved 11 February 2006.
↑ Transmissions Parts catalogue : https://global-uploads.webflow.com/5d4ad27f935075baaeb45f60/5fb67c61d98f56954b343a33_2020.11.18%20APC%20Catalog%20without%20images.pdf
↑ 4HP18 FLA Transmission filter : https://www.allomatic.com/transmission-filters/515426
1 2 3 "BMW E30 3 Series Specifications".
1 2 3 4 5 6 7 8 "BMW E28 Specifications".
↑ "BMW E23 735i user manual, PDF p. 125" (PDF).
↑ "South African version BMW E23 745i user manual, PDF p. 117" (PDF).^{[dead link]}
1 2 "BMW E34 user manual, 1989, p. 111".{{cite web}}: CS1 maint: deprecated archival service (link)
1 2 3 "BMW E32 user manual, PDF p. 51" (PDF). Archived from the original (PDF) on 2016-03-04. Retrieved 2013-06-28.
1 2 "Chevrolet Opala Specifications".
1 2 "Chevrolet Opala Original table of gear ratios". Archived from the original on May 8, 2014.
1 2 3 A. K. Legg, Peugeot 505 Owners Workshop Manual, Haynes Publishing Group, 1989, ISBN 0-85696-762-9, p. 132
1 2 3 Octavio Trentini, Reparación y ajuste de automoviles Peugeot 505, Cosmopolita publisher, 1995, ISBN 950-9069-69-8, p. 148, 149
1 2 3 4 5 Peugeot 505 User manual, Peugeot, 1987, Paris, p. 146, 147
↑ Peugeot 505 User manual, Peugeot, 1987, Madrid, p. 109
↑ Peugeot 505 User manual, Peugeot, 1987, Madrid, p. 131
↑ Volvo 740 User manual, 1985
↑ "Volvo 740 User manual, 1986, PDF p. 126, 127" (PDF).
↑ Volvo 240-740-760 Essence, Diesel (in French). France: Revue Technique Automobile. pp. 5–6. ISBN 978-2726847947.
↑ "Volvo 760 GLE user manual, 1984, PDF p. 110" (PDF).
↑ "Peugeot 309 1987 Automatic brochure". Peugeot.
↑ "Vraagbaak Volvo 440/460/480 Benzinemodellen" by P.H. Olving, April 2011, ISBN 9789021534091

External links

"ZF North America Application Chart (automatic)" (PDF). ZF-Group.com. Archived from the original (PDF) on 4 January 2006. Retrieved 11 February 2006.

[1] Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage

[Forward-2] 1 2 Forward gears only

[3] Hydraulic torque converter · German: Hydraulischer Wandler oder Drehmomentwandler

[4] Planetary gearing · German: Planetenradsätze

[5] 3HP to 6HP: specified indirectly via the input shaft diameter
8HP to 9HP: specified directly

[9] without any claim of completeness

[29] Audi Quattro 4x4

[30] Audi FWD

[zf-chart-6] 1 2 3 4 5 6 7 8 9 10 11 12 "ZF North America Application Chart (automatic)" (PDF). ZF-Group.com. Archived from the original (PDF) on 4 January 2006. Retrieved 11 February 2006.

[7] Transmissions Parts catalogue : https://global-uploads.webflow.com/5d4ad27f935075baaeb45f60/5fb67c61d98f56954b343a33_2020.11.18%20APC%20Catalog%20without%20images.pdf

[8] 4HP18 FLA Transmission filter : https://www.allomatic.com/transmission-filters/515426

[E30-10] 1 2 3 "BMW E30 3 Series Specifications".

[E28-11] 1 2 3 4 5 6 7 8 "BMW E28 Specifications".

[E23-1-12] "BMW E23 735i user manual, PDF p. 125" (PDF).

[E23-2-13] "South African version BMW E23 745i user manual, PDF p. 117" (PDF).^{[dead link]}

[E34-14] 1 2 "BMW E34 user manual, 1989, p. 111".{{cite web}}: CS1 maint: deprecated archival service (link)

[E32-15] 1 2 3 "BMW E32 user manual, PDF p. 51" (PDF). Archived from the original (PDF) on 2016-03-04. Retrieved 2013-06-28.

[Opala1-16] 1 2 "Chevrolet Opala Specifications".

[Opala2-17] 1 2 "Chevrolet Opala Original table of gear ratios". Archived from the original on May 8, 2014.

[505-1-18] 1 2 3 A. K. Legg, Peugeot 505 Owners Workshop Manual, Haynes Publishing Group, 1989, ISBN 0-85696-762-9, p. 132

[505-2-19] 1 2 3 Octavio Trentini, Reparación y ajuste de automoviles Peugeot 505, Cosmopolita publisher, 1995, ISBN 950-9069-69-8, p. 148, 149

[505-3-20] 1 2 3 4 5 Peugeot 505 User manual, Peugeot, 1987, Paris, p. 146, 147

[505-4-21] Peugeot 505 User manual, Peugeot, 1987, Madrid, p. 109

[505-5-22] Peugeot 505 User manual, Peugeot, 1987, Madrid, p. 131

[740-1-23] Volvo 740 User manual, 1985

[740-2-24] "Volvo 740 User manual, 1986, PDF p. 126, 127" (PDF).

[25] Volvo 240-740-760 Essence, Diesel (in French). France: Revue Technique Automobile. pp. 5–6. ISBN 978-2726847947.

[760-1-26] "Volvo 760 GLE user manual, 1984, PDF p. 110" (PDF).

[27] "Peugeot 309 1987 Automatic brochure". Peugeot.

[28] "Vraagbaak Volvo 440/460/480 Benzinemodellen" by P.H. Olving, April 2011, ISBN 9789021534091

[a]

[b]

[c]

[d]

[a]

[1]

[2]

[3]

[a]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

[12]

[13]

[14]

[15]

[16]

[17]

[18]

[19]

[20]

[21]

[22]

[b]

[c]

Key data

1980: Simpson planetary gearset types— first design with 3 planetary gearsets —

Design

4HP 22

4HP 22EH

4HP 22HL

4HP 24

4HP 24A

1984: Ravigneaux planetary gearset types— design with 2 planetary gearsets combined in 1 compound planetary gearset —

Design

4HP 14

4HP 18

4HP 18FL

4HP 18FLA

4HP 18FLE

4HP 18Q

4HP 18QE

4HP 18EH

1995: Simpson planetary gearset types— second design with 2 planetary gearsets —

Design

4HP 16

4HP 20

Applications

See also

References

External links

1980: Simpson planetary gearset types
— first design with 3 planetary gearsets —

1984: Ravigneaux planetary gearset types
— design with 2 planetary gearsets combined in 1 compound planetary gearset —

1995: Simpson planetary gearset types
— second design with 2 planetary gearsets —