Open main menu

AbstractEdit

6HP is ZF Friedrichshafen AG's trademark name for its six-speed automatic transmission models (6-speed transmission with Hydraulic converter and Planetary gearsets) for longitudinal engine applications, designed and built by ZF's subsidiary in Saarbrücken. Released as the 6HP26 in 2000, it was the first six-speed automatic transmission in a production passenger car. Other variations of the first generation 6HP in addition to the 6HP26, were 6HP19, and 6HP32 having lower and higher torque capacity, respectively. In 2007, the second generation of the 6HP series was introduced, with models 6HP21 and 6HP28. A 6HP34 was planned, but never went into production.

The 6HP uses a Lepelletier epicyclic/planetary gearset, which can provide more gear ratios with significantly fewer components. This means the 6HP26 is actually lighter than its five-speed 5HP predecessors. It also has the capability to achieve torque converter lock-up on all six forward gears, and disengage it completely when at a standstill, dramatically closing the fuel efficiency gap between automatic and manual transmissions.

The last 6HP automatic transmission was produced by the Saarbrücken plant in March 2014 after 7,050,232 units were produced.[1][2] The ZF plant in Shanghai continued to produce the 6HP for the Chinese market.[1]

SpecificationsEdit

Preliminary NoteEdit

All ZF 6HP gearboxes have the same gear ratios as the 6R60 and 6R80 gearboxes for passenger cars from Ford have. Deviant gear ratios indicate another manufacturer.

New ParadigmEdit

The 6HP is the first transmission designed according to ZF's new paradigm. After gaining additional gear ratios only with additional components, this time the number of components has to decrease for the first time in spite of the necessity of even more ratios. Coming from 5 gear ratios made of 10 main components (gear sets, Ravigneaux considered as 2, brakes, clutches) to the 6 made of 8 now reflects, what major progress the Lepelletier gear mechanism means compared to conventional designs like the 5HP-family.

Technical DataEdit

Gear Teeth

and Ratios

Planetary Gearset: Teeth

Lepelletier Gear Mechanism

Count Total Avg.
Ravigneaux Simple
Type Sun 1.1

Ring 1.1

Sun 1.2

Ring 1.2

Sun 2

Ring 2

Brakes

Clutches

Ratio

Span

Gear

Step

Gear 1 2 3 4 5 6 R
6HP ALL 31

38

38

85

37

71

2

3

6.0354 1.4327
Ratio 4.1708 2.3397 1.5211 1.1428 0.8672 0.6911 - 3.4025
5HP 18[a][b] 34

98

38

34

32

76

3

4

4.9363 1.4906
Ratio 3.6648 1.9990 1.4067 1.0000 0.7424 - 4.0960
Aisin

AWTF-80 SC

36

44

44

96

45

81

2

3

6.0494 1.4333
Ratio 4.1481 2.3704 1.5556 1.1546 0.8593 0.6857 - 3.3939
Ford

6R60 · 6R80

31

38

38

85

37

71

2

3

6.0354 1.4327
Ratio 4.1708 2.3397 1.5211 1.1428 0.8672 0.6911 - 3.4025
Ford

6R140

37

47

47

97

49

95

2

3

5.8993 1.4261
Ratio 3.9738 2.3181 1.5158 1.1492 0.8585 0.6736 - 3.1283
GM

6L50

37

47

47

97

49

89

2

3

6.0346 1.4326
Ratio 4.0650 2.3712 1.5506 1.1567 0.8532 0.6736 - 3.2001
GM

6L80

35

46

46

92

50

94

2

3

6.0401 1.4329
Ratio 4.0267 2.3635 1.5319 1.1522 0.8521 0.6667 - 3.0638


Technical imperfectionsEdit

Problems with this transmission are well known. This transmission locks up the torque converter in all gears, increasing wear. Combined with a sealed transmission pan and "lifetime fluid", some people have experienced catastrophic transmission failure.

There are also problems with the valve block and solenoids. When this failure starts to occur, shift quality and speed, torque transfer and even loss of ability to engage gears can occur. These problems led Volkswagen AG to extend the warranty on all of their vehicles equipped with this transmission to 100,000 miles or 10 years.

First generationEdit

6HP19Edit

The 6HP19 transmission was a development of the original 6HP26, but was downgraded for less demanding applications. As such, the 6HP19 is rated at 400 N⋅m (295 lb⋅ft) of torque.

Applications Rear-wheel drive cars:

  • BMW X3
  • BMW 520i (E60)
  • BMW 530i, (E60), pre-LCI
  • BMW 630i, (E63), pre-LCI
  • BMW 318i, 320i, 325i, 328i, 330i (E9X), pre-LCI
  • BMW 116i, 118i, 120i (E87), pre-LCI, 135i (E82)
  • Hyundai Genesis Coupe (2010-2012 3.8L)

6HP19AEdit

The 6HP19A is a variation of the 6HP19 for four-wheel drive applications. It was used by the Volkswagen Group for some permanent four-wheel drive models.

Applications

6HP26Edit

The 6HP26 was the original variation of the 6HP, released in 2000. It was rated for a maximum input torque of 600 newton metres (443 lbf⋅ft). It was first used by the BMW 7 Series (E65) in 2001. Initially reserved for high end luxury and sports cars, ZF made the 6HP26 available to Hyundai for use on its 2009 model year V8 Genesis.

Several versions of the 6HP26 are available depending on application and brand: 6HP26, 6HP26A and 6HP26X.

Applications Ford has developed their own versions (6R60 and 6R80) based on the 6HP26. Therefore, certain Ford vehicles will not be listed.

Two-wheel drive version:

6HP26AEdit

The 6HP26A is a variation of the 6HP26 for four-wheel drive applications. It was used by the Volkswagen Group for some permanent four-wheel drive models.

Applications

6HP26X & 6HP26ZEdit

The 6HP26X and 6HP26Z is another variation of the 6HP26, also for four-wheel drive applications. This transmission is suitable for 4WDs with a separate transfer box (the "X" stands for external 4WD).

Applications

6HP32Edit

The 6HP32 is a variation of the 6HP26 for high-output applications. The gearbox's maximum input torque is 750 N⋅m (550 lb⋅ft).[11]

Applications

  • BMW E65 745d (LCI)
  • Volkswagen Phaeton 5.0 V10 TDi (6HP-32A, internal 4x4)

Second generationEdit

6HP21Edit

The 6HP21 was a variation of the 6HP apparently produced in China.[2] It is also unilaterally known as 6HP19tu and 6HP19z.

Applications

  • 2014–2016 Ford Falcon (FG X naturally-aspirated inline-six, turbocharged inline-six and supercharged V8 )[2]
  • 2014–2016 Ford Territory (SZ II petrol)[10]
  • 2010-2012 BMW 320d Lci (Thailand) (Engine N47D20)
  • 2006-2012 BMW 335i (E9X)
  • BMW Z4 3.0si (E89)

6HP28Edit

The 6HP28 was the second generation of the 6HP gearbox, introduced in mid-2006.

Applications Two-wheel drive version:

NotesEdit

  1. ^ no Lepelletier gear mechanism is applied · shown here to reflect the progress the Lepelletier gear mechanism means
  2. ^ inner and outer sun gear of the Ravigneaux planetary gearset are inverted

See alsoEdit

ReferencesEdit

  1. ^ a b "More than Seven Million: ZF Ends Production of Successful 6-Speed Automatic Transmission" (Press release). ZF Friedrichshafen. 31 March 2014. Retrieved 2 August 2016.
  2. ^ a b c d e "Review: Ford FG X Falcon (2014–16)". AustralianCar.Reviews. Retrieved 2 August 2016.
  3. ^ Markus, Frank (November 2001). "BMW 745i – First Drive Review". Car and Driver. Archived from the original on 18 September 2014.
  4. ^ "2003 model year XK service training technical guide" (PDF). Jaguar Cars North America. 30 September 2002. p. 4. Archived from the original (PDF) on 8 January 2016.
  5. ^ Crawford, Anthony (25 July 2007). "2007 Aston Martin DB9 Coupe Road Test". CarAdvice. Retrieved 13 September 2016.
  6. ^ a b c "Aston Martin Automatic Gearboxes". JT Automatics Ltd. Archived from the original on 25 April 2016.
  7. ^ "Review: Ford BF Falcon (2005–10)". AustralianCar.Reviews. Retrieved 2 August 2016.
  8. ^ "Review: Ford FG Falcon (2008–14)". AustralianCar.Reviews. Retrieved 2 August 2016.
  9. ^ "Review: Ford SY Territory (2005–11)". AustralianCar.Reviews. Retrieved 2 August 2016.
  10. ^ a b "Review: Ford SZ Territory (2011–16)". AustralianCar.Reviews. Retrieved 2 August 2016.
  11. ^ "ZF 6HP26 Transmission" (PDF). Retrieved 2017-02-02.