ZF_4HP20_transmission

4HP 20 · 4HP 22 · 4HP 24
4HP 14 · 4HP 16 · 4HP 18
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

ZF 4HP transmission

Motor vehicle

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.

Quick Facts 4HP 20 · 4HP 22 · 4HP 24 4HP 14 · 4HP 16 · 4HP 18, Overview ...

Specifications

1980: Simpson Planetary Gearset Types

More information

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Gear Teeth and Ratios^{[lower-alpha 1]}		Planetary Gearset Teeth^{[lower-alpha 2]}			Count	Total	Avg.
Gear Teeth and Ratios^{[lower-alpha 1]}		Simpson		Simple	Count	Total	Avg.

Model Type	Version First Delivery	$S_{1}$ ^{[lower-alpha 3]} $R_{1}$ ^{[lower-alpha 4]}	$S_{2}$ ^{[lower-alpha 5]} $R_{2}$ ^{[lower-alpha 6]}	$S_{3}$ ^{[lower-alpha 7]} $R_{3}$ ^{[lower-alpha 8]}	Brakes Clutches	Ratio Span	Gear Step
Gear $n$		R		1	2	3	4
Step $i_{n-1}/i_{n}$		–R : 1			1 : 2	2 : 3	3 : 4

4HP 22 Big Engines	380 N⋅m (280 lb⋅ft) 1980	35 73	35 73	31 83	4 3	3.4055	1.5045
Ratio $i_{n}$		−2.0857 $-{\tfrac {73}{35}}$		2.4795 ${\tfrac {181}{73}}$	1.4795 ${\tfrac {108}{73}}$	1.0000 ${\tfrac {1}{1}}$	0.7281 ${\tfrac {83}{114}}$
Step		0.8412			1.6759	1.4795	1.3735

4HP 22 Small Engines	220 N⋅m (162 lb⋅ft) 1980	35 73	41 73	31 83	4 3	3.7539	1.5541
Ratio $i_{n}$		−2.0857 $-{\tfrac {73}{35}}$		2.7331 ${\tfrac {6,983}{2,555}}$	1.5616 ${\tfrac {114}{73}}$	1.0000 ${\tfrac {1}{1}}$	0.7281 ${\tfrac {83}{114}}$
Step		0.7631			1.7501	1.5616	1.3735

Ratio		$-{\tfrac {R_{1}}{S_{1}}}$	${\tfrac {S_{1}(S_{2}+R_{2})+R_{1}S_{2}}{S_{1}R_{2}}}$		${\tfrac {S_{2}+R_{2}}{R_{2}}}$	${\tfrac {1}{1}}$	${\tfrac {R_{3}}{S_{3}+R_{3}}}$

Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
Layout
(1) Planetary gearset 1 is on the input (turbine) side
(2) Output shaft is ring 3 (ring gear of gearset 3)
Sun gear of gearset 1
Ring gear of gearset 1
Sun gear of gearset 2
Ring gear of gearset 2
Sun gear of gearset 3
Ring gear of gearset 3

1984: Ravigneaux Planetary Gearset Types

More information

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Gear Teeth and Ratios^{[lower-alpha 1]}		Planetary Gearset Teeth^{[lower-alpha 2]} Ravigneaux		Count	Total	Avg.

Model	Version First Delivery	${S_{1}}$ ^{[lower-alpha 3]} ${R_{1}}$ ^{[lower-alpha 4]}	${S_{2}}$ ^{[lower-alpha 5]} ${R_{2}}$ ^{[lower-alpha 6]}	Brakes Clutches	Ratio Span	Gear Step
Gear	R		1	2	3	4
Step $i_{n-1}/i_{n}$	–R : 1			1 : 2	2 : 3	3 : 4

4HP 14	1984	34 29^{[lower-alpha 7]}	29 82	2 3	3.2647	1.4835
Ratio $i_{n}$	−2.8276 $-{\tfrac {82}{29}}$		2.4118 ${\tfrac {41}{17}}$	1.3688 ${\tfrac {861}{629}}$	1.0000 ${\tfrac {1}{1}}$	0.7387 ${\tfrac {82}{111}}$
Step	1.1724			1.7619	1.3688	1.3537

4HP 18	FLE 1991	38 34^{[lower-alpha 7]}	34 98	2 3	3.4737	1.5145
Ratio $i_{n}$	−2.8824 $-{\tfrac {49}{17}}$		2.5789 ${\tfrac {49}{19}}$	1.4067 ${\tfrac {294}{209}}$	1.0000 ${\tfrac {1}{1}}$	0.7424 ${\tfrac {49}{66}}$
Step	1.1176			1.8333	1.4067	1.3469

Ratio	$-{\tfrac {R_{2}}{S_{2}}}$		${\tfrac {R_{1}R_{2}}{S_{1}S_{2}}}$	${\tfrac {R_{2}(S_{1}+R_{1})}{S_{1}(S_{2}+R_{2})}}$	${\tfrac {1}{1}}$	${\tfrac {R_{2}}{S_{2}+R_{2}}}$

Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
Layout
Output shaft is ring 2 (ring gear of outer Ravigneaux gearset part)
Sun 1: sun gear of gearset 1: inner Ravigneaux gearset
Ring 1: ring gear of gearset 1: inner Ravigneaux gearset
Sun 2: sun gear of gearset 2: outer Ravigneaux gearset
Ring 2: ring gear of gearset 2: outer Ravigneaux gearset
inner and outer sun gears of the Ravigneaux planetary gearset are inverted

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This article uses material from the Wikipedia article ZF_4HP20_transmission, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.

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

[3] Layout
(1) Planetary gearset 1 is on the input (turbine) side
(2) Output shaft is ring 3 (ring gear of gearset 3)

[4] Sun gear of gearset 1

[5] Ring gear of gearset 1

[6] Sun gear of gearset 2

[7] Ring gear of gearset 2

[8] Sun gear of gearset 3

[9] Ring gear of gearset 3

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

[11] Layout
Output shaft is ring 2 (ring gear of outer Ravigneaux gearset part)

[12] Sun 1: sun gear of gearset 1: inner Ravigneaux gearset

[13] Ring 1: ring gear of gearset 1: inner Ravigneaux gearset

[14] Sun 2: sun gear of gearset 2: outer Ravigneaux gearset

[15] Ring 2: ring gear of gearset 2: outer Ravigneaux gearset

[inverted-16] r and outer sun gears of the Ravigneaux planetary gearset are inverted

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"Chevrolet Opala Specifications".

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A. K. Legg, Peugeot 505 Owners Workshop Manual, Haynes Publishing Group, 1989, ISBN 0-85696-762-9, p. 132

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Octavio Trentini, Reparación y ajuste de automoviles Peugeot 505, Cosmopolita publisher, 1995, ISBN 950-9069-69-8, p. 148, 149

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Peugeot 505 User manual, Peugeot, 1987, Paris, p. 146, 147

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Peugeot 505 User manual, Peugeot, 1987, Madrid, p. 109

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"Volvo 740 User manual, 1985".

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"Volvo 740 User manual, 1986, PDF p. 126, 127" (PDF).

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"Volvo 760 GLE user manual, 1984, PDF p. 110" (PDF).

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"Peugeot 309 1987 Automatic brochure". Peugeot.

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

[36] [21]
Transmissions Parts catalogue : https://global-uploads.webflow.com/5d4ad27f935075baaeb45f60/5fb67c61d98f56954b343a33_2020.11.18%20APC%20Catalog%20without%20images.pdf

[37] [22]
4HP18 FLA Transmission filter : https://www.allomatic.com/transmission-filters/515426

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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

ZF_4HP20_transmission

ZF 4HP transmission

1980: Simpson Planetary Gearset Types

1984: Ravigneaux Planetary Gearset Types

Specifications

Nomenclature

1980: Simpson Planetary Gearset Types

1984: Ravigneaux Planetary Gearset Types

Applications

1980: Simpson Planetary Gearset Types

4HP 20

4HP 22

4HP 22EH

4HP 22HL

4HP 24

4HP 24A

1984: Ravigneaux Planetary Gearset Types

4HP 14

4HP 16

4HP 18FL

4HP 18FLA · Audi Quattro 4x4

4HP 18FLE · Audi FWD

4HP 18Q

4HP 18QE

4HP 18EH

See also

References

External links

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