ZF 6HP transmission

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The ZF 6HP was the first six-speed automatic transmission in a production passenger car. Released as the 6HP26 by ZF Friedrichshafen in 2000, it was manufactured by ZF Getriebe GmbH in Saarbrücken, Germany. 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]

Problems[edit]

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 generation[edit]

6HP19[edit]

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.

Gear ratios:

1 2 3 4 5 6 R final drive Application
4.07 2.37 1.55 1.16 0.85 0.67 3.20 4.44 BMW X3
4.17 2.34 1.52 1.14 0.87 0.69 3.40 3.73 Hyundai Genesis Coupe

Applications[edit]

Rear-wheel drive cars:

  • BMW X3
  • BMW 520i (E60)
  • BMW 530i, (E60), pre-LCI
  • BMW 630i, (E63), pre-LCI
  • BMW 320i, 325i, 330i, 335i (E90), pre-LCI
  • BMW 116i, 118i, 120i (E87), pre-LCI

6HP19A[edit]

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[edit]

6HP26[edit]

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 the 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.

Gear ratios:

1 2 3 4 5 6 R final drive
4.171:1 2.34:1 1.521:1 1.143:1 0.867:1 0.691:1 3.40:1 2.81:1 (BMW 335d) / 3.65:1 (BMW X5 xDrive35d) / 3.46:1 (BMW non-diesel cars)

Applications[edit]

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:

6HP26A[edit]

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[edit]

6HP26X[edit]

The 6HP26X 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[edit]

6HP32[edit]

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[edit]

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

Second generation[edit]

6HP21[edit]

The 6HP21 was a low-torque variation of the 6HP produced in China.[2]

Applications[edit]

6HP28[edit]

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

Applications[edit]

Two-wheel drive version:

See also[edit]

References[edit]

  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 02.02.2017.  Check date values in: |access-date= (help)