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ZF 6HP transmission

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(Redirected from ZF 6HP26 transmission)
6HP
Automatic Transmission 6HP 26 cutaway
Overview
ManufacturerZF Friedrichshafen
Production2000–2014
Model years2000–2014
Body and chassis
Class6-Speed Longitudinal Automatic Transmission
RelatedFord 6R
GM 6L
Aisin AWTF-80 SC
Chronology
PredecessorZF 5HP Transmission
Successor ZF 8HP Transmission

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 6HP 26 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 6HP 26, were 6HP19, and 6HP 32 having lower and higher torque capacity, respectively. In 2007, the second generation of the 6HP series was introduced, with models 6HP 21 and 6HP 28. A 6HP 34 was planned, but never went into production.

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]

Specifications

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New Paradigm

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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 while the number of ratios still increase. The 6HP uses a Lepelletier epicyclic/planetary gearset, which can provide more gear ratios with significantly fewer components. This means the 6HP 26 is actually lighter than its five-speed 5HP predecessors. Coming from 5 gear ratios made of 10 main components[a] to the 6 made of 8 now reflects, what major progress the Lepelletier gear mechanism means compared to conventional designs like the 5HP-family.

Basic concept

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A conventional planetary gearset and a compound Ravigneaux gearset is combined in a Lepelletier gear mechanism,[3] to reduce both the size and weight. It was first realized here. Like all transmissions realized with Lepelletier transmissions, the 6HP also dispenses with the use of the direct gear ratio, making it one of the very few automatic transmission concepts without such a ratio.

It also has the capability to achieve torque converter lock-up on all six forward gears, and disengage it completely when at a standstill, significantly closing the fuel efficiency gap between automatic and manual transmissions.

Technical data

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Gear Ratios[b]
Gear
Model
R 1 2 3 4 5 6 Total
Span
Avg.
Step
Compo-
nents
2000: 1st Generation 3
Gearsets
2
Brakes
3
Clutches
ZF 6HP 26
ZF 6HP 19
ZF 6HP 32
−3.403 4.171 2.340 1.521 1.143 0.867 0.691 6.035 1.433
2007: 2nd Generation
ZF 6HP 28
ZF 6HP 29
ZF 6HP 34
−3.403 4.171 2.340 1.521 1.143 0.867 0.691 6.035 1.433
Other Manufacturer
Aisin AWTF-80 SC · 2005 −3.394 4.148 2.370 1.556 1.155 0.859 0.686 6.049 1.433
Ford 6R 60 · 6R 80 · 2005 −3.403 4.171 2.340 1.521 1.143 0.867 0.691 6.035 1.433
Ford 6R 140 · 2005 −3.128 3.974 2.318 1.516 1.149 0.858 0.674 5.899 1.426
GM 6L 45 · 6L 50 · 2006 −3.200 4.065 2.371 1.551 1.157 0.853 0.674 6.035 1.433
GM 6L 80 · 6L 90 · 2005 −3.064 4.027 2.364 1.532 1.152 0.852 0.667 6.040 1.433
  1. ^ 3 gearsets (of which 2 gearsets are combined as a Ravigneaux compound gearset), brakes, clutches
  2. ^ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage

Imperfections

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Problems with this transmission are well known.[citation needed] 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. Owners report shift issues when oil begins breaking down beyond 50K miles, hence shifting issues are common.[citation needed]

There are also problems with the valve block and solenoids[citation needed] 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 Group to extend the warranty on all of their vehicles equipped with this transmission to 100,000 miles or 10 years.[citation needed]

Applications

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First generation

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6HP 19

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  • BMW X3
  • BMW 520i (E60)
  • BMW 528i (E60)
  • BMW 530i, (E60)
  • BMW 630i, (E63)
  • BMW 730i/li, (E65/E66)
  • BMW 318i, 320i, 325i, 328i, 330i, 335i (E9X), pre-LCI
  • BMW 116i, 118i, 120i (E87), pre-LCI, 135i (E82), 118d (E81)
  • BMW Z4 E85 LCI, E86 (All models except Z4 M)
  • Hyundai Genesis Coupe - 2010-2012 3.8L

6HP 19A

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The 6HP 19A is a variation of the 6HP 19 for Four-wheel drive applications (Allrad, all wheel).It was used by the Volkswagen Group for some permanent four-wheel drive models.

6HP 26

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The 6HP 26 was the initial version and first used by the BMW 7 Series (E65) in 2001. Initially only used by premium brands, it was later available on the 2009 model year V8 Hyundai Genesis.

Several versions of the 6HP 26 are available depending on application and brand: 6HP 26, 6HP 26A and 6HP 26X.

Ford has developed their own versions (Ford 6R 60 and Ford 6R 80) based on the 6HP 26. Therefore, certain Ford vehicles will not be listed.

6HP 26A

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The 6HP 26A is a variation of the 6HP 26 for Four-wheel drive applications (Allrad, all wheel). It was used by the Volkswagen Group for some permanent four-wheel drive models and packages a TORSEN type center differential, and open front differential into the transmission assembly.


6HP 26X & 6HP 26Z

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The 6HP 26X and 6HP 26Z is another variation of the 6HP 26, also for Four-wheel drive applications. This transmission is suitable for 4WDs with a separate transfer box (the "X" stands for external 4WD).

6HP 32

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  • BMW E65 745d (LCI)

6HP 32A

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The 6HP 32A is a variation of the 6HP 32 for Four-wheel drive applications (Allrad, all wheel).

  • Audi Q7 6.0 V12 TDI

Second generation

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6HP 21

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  • 2011–2014 Ford Falcon (FG2 turbocharged inline-four, naturally-aspirated inline-six, turbocharged inline-six and supercharge V8)
  • 2014–2016 Ford Falcon (FG X turbocharged inline-four, naturally-aspirated inline-six, turbocharged inline-six and supercharged V8 )[2]
  • 2014–2016 Ford Territory (SZ II petrol)[14]
  • 2010–2012 BMW 320d Lci (Thailand) (Engine N47D20)
  • 2011–2013 BMW 335i (E9X)
  • 2013–2015 BMW X1 (E84) xDrive35i
  • 2009 LCI (BMW 528i E60) (Engine: N52B30AE)
  • 2014-Present Maxus G10

6HP 28

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6HP 34

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The 6HP 34 was planned for high-output applications. As the successor 8HP was about to be launched and innovations are typically introduced first in the premium segment, the 6HP 34 never went into production.[5]

See also

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References

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  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. ^ Riley, Mike (2013-09-01). "Lepelletier Planetary System". Transmission Digest. Archived from the original on 2023-06-21. Retrieved 2023-03-03.
  4. ^ "ZF 6HP26 Transmission" (PDF). Retrieved 2017-02-02.
  5. ^ a b "ZF 6HP34" (PDF). ZF Friedrichshafen AG. Retrieved 18 September 2009.[permanent dead link]
  6. ^ Kasuya, Satoru; Taniguchi, Takao; Tsukamoto, Kazumasa; Hayabuchi, Masahiro; Nishida, Masaaki; Suzuki, Akitomo; Niki, Hiroshi (2005). "AISIN AW New High Torque Capacity Six-Speed Automatic Transmission for FWD vehicles". SAE Transactions. 114: 1193–1201. ISSN 0096-736X. JSTOR 44725152. Archived from the original on 2020-07-20. Retrieved 2020-07-09.
  7. ^ Markus, Frank (November 2001). "BMW 745i – First Drive Review". Car and Driver. Archived from the original on 18 September 2014.
  8. ^ "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.
  9. ^ Crawford, Anthony (25 July 2007). "2007 Aston Martin DB9 Coupe Road Test". CarAdvice. Retrieved 13 September 2016.
  10. ^ a b c "Aston Martin Automatic Gearboxes". JT Automatics Ltd. Archived from the original on 25 April 2016.
  11. ^ "Review: Ford BF Falcon (2005–10)". AustralianCar.Reviews. Retrieved 2 August 2016.
  12. ^ "Review: Ford FG Falcon (2008–14)". AustralianCar.Reviews. Retrieved 2 August 2016.
  13. ^ "Review: Ford SY Territory (2005–11)". AustralianCar.Reviews. Retrieved 2 August 2016.
  14. ^ a b "Review: Ford SZ Territory (2011–16)". AustralianCar.Reviews. Retrieved 2 August 2016.