The ZF 4HP14 is a four-speed automatic transmission for passenger cars from ZF Friedrichshafen AG. Introduced in 1984, and produced through 2001, it was used in Citroën, Peugeot, and Daewoo front-wheel drive cars.

Specifications

Technical data

Gear Teeth and Ratios		Planetary Gearset Teeth[lower-alpha 1] Ravigneaux		Count	Total	Avg.
Model	Version First Delivery	${\displaystyle {S_{.1}}}$[lower-alpha 2] ${\displaystyle {R_{.1}}}$[lower-alpha 3]	${\displaystyle {S_{.2}}}$[lower-alpha 4] ${\displaystyle {R_{.2}}}$[lower-alpha 5]	Brakes Clutches	Ratio Span	Gear Step
Gear	R		1	2	3	4
Step ${\displaystyle i_{n-1}/i_{n}}$	–R : 1			1 : 2	2 : 3	3 : 4
4HP 14	1984	34 29[lower-alpha 6]	29 82	2 3	3.2647	1.4835
Ratio ${\displaystyle i_{n}}$	−2.8276 ${\displaystyle -{\tfrac {82}{29}}}$		2.4118 ${\displaystyle {\tfrac {41}{17}}}$	1.3688 ${\displaystyle {\tfrac {861}{629}}}$	1.0000 ${\displaystyle {\tfrac {1}{1}}}$	0.7387 ${\displaystyle {\tfrac {82}{111}}}$
Step	1.1724			1.7619	1.3688	1.3537
4HP 18	FLE 1991	38 34[lower-alpha 6]	34 98	2 3	3.4737	1.5145
Ratio ${\displaystyle i_{n}}$	−2.8824 ${\displaystyle -{\tfrac {49}{17}}}$		2.5789 ${\displaystyle {\tfrac {49}{19}}}$	1.4067 ${\displaystyle {\tfrac {294}{209}}}$	1.0000 ${\displaystyle {\tfrac {1}{1}}}$	0.7424 ${\displaystyle {\tfrac {49}{66}}}$
Step	1.1176			1.8333	1.4067	1.3469
Ratio	${\displaystyle -{\tfrac {R_{.2}}{S_{.2}}}}$		${\displaystyle {\tfrac {R_{.1}R_{.2}}{S_{.1}S_{.2}}}}$	${\displaystyle {\tfrac {R_{.2}(S_{.1}+R_{.1})}{S_{.1}(S_{.2}+R_{.2})}}}$	${\displaystyle {\tfrac {1}{1}}}$	${\displaystyle {\tfrac {R_{.2}}{S_{.2}+R_{.2}}}}$

1. ↑ Planetary gearset orientation: output shaft is ring .2 (ring gear of outer Ravigneaux gearset part)
2. ↑ Sun .1: sun gear of inner Ravigneaux gearset part
3. ↑ Ring .1: ring gear of inner Ravigneaux gearset part
4. ↑ Sun .2: sun gear of outer Ravigneaux gearset part
5. ↑ Ring .2: ring gear of outer Ravigneaux gearset part
6. 1 2 inner and outer sun gears of the Ravigneaux planetary gearset are inverted

Applications

• 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^[1]
• 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^[2]
• 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

See also

• list of ZF transmissions

References

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