Skip to content
MotorFiable

Dualogic vs ZF 6HP: which gearbox is more reliable?

According to our risk index, the Dualogic gearbox carries less risk than the ZF 6HP gearbox: 29/100 versus 46/100 (both moderate risk). The Dualogic gearbox has 1 documented serious fault, the main one being «Actuator or hydraulic pressure fault: the gearbox drops into neutral on its own or refuses gears»; the ZF 6HP gearbox has 1 documented serious fault, the main one being «Valve body and mechatronic failure: erratic shifts or a locked-up gearbox».

Risk index

Dualogic

29

Moderate risk · 1 serious fault

Lower risk

Risk index

ZF 6HP

46

Moderate risk · 1 serious fault

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

12 sourcesHow we work

Is the Dualogic gearbox reliable?

The Dualogic is the automated manual gearbox that Fiat has fitted since 2003 to models such as the 500, Panda, Grande Punto/Punto, Doblò and Qubo, and that Lancia sells as D.F.N. on the Ypsilon. It has no systemic fault acknowledged by the manufacturer, but there are recurring testimonies of jerking on every gearchange, clutches that wear out early, and actuator faults that make the gearbox drop into neutral on its own while driving.[1][2][3]

See the 2 of the Dualogic gearbox faults

Is the ZF 6HP gearbox reliable?

The ZF 6HP is the six-speed torque-converter automatic gearbox that ZF built between 2000 and 2014, fitted by BMW (Steptronic), Audi (tiptronic, in the A6 and A8 quattro), Jaguar and Land Rover, before handing over to the ZF 8HP. It has a reputation for lasting a lot of kilometres, but with age it accumulates jerking, valve body and mechatronic faults, leaks and a controversy over the "lifetime" oil, which several workshops advise changing earlier.[4][5][6][7][8]

See the 3 of the ZF 6HP gearbox faults

Side-by-side comparison

Comparison of Dualogic and ZF 6HP
DualogicZF 6HP
Technical data
TypeGearboxGearbox
Gearbox type5-speed automated manual (AMT), single dry clutch, electrohydraulic actuation of the clutch and gear selectionTorque-converter automatic with Lepelletier planetary gear sets, 6-speed, longitudinal mounting
Productionsince 2003[1][9][10]2000–2014[4]
Reliability
Risk index (what is it?)29Moderate risk46Moderate risk
Documented faults23
Of high or critical severity11
Worst severityHigh severityHigh severity
Main faults
  1. High severity: Actuator or hydraulic pressure fault: the gearbox drops into neutral on its own or refuses gears
  2. Medium severity: Premature wear or breakage of the Dualogic clutch
  1. High severity: Valve body and mechatronic failure: erratic shifts or a locked-up gearbox
  2. Medium severity: Jerking and harsh shifts from converter wear and ageing oil
  3. Medium severity: Oil leaks from the sump or the gearbox seals
Most expensive documented repairNo reliable dataup to €10,000Valve body and mechatronic failure: erratic shifts or a locked-up gearboxPublished figure[6][7]
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • Dualogic 5-speed (2003-present)[2][3]
AvoidVersions to avoidNoneNone

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

Dualogic

See the 9 models with the Dualogic gearbox

ZF 6HP

See the 10 models with the ZF 6HP gearbox

Other comparisons

With the Dualogic gearbox

With the ZF 6HP gearbox

Compare other engines

That is the comparison you are viewing: change one of the two engines.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. DualogicWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  2. Fiabilité et pannes de la Fiat 500Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  3. Fiat 500 (ab 2007) – alle bekannten Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · published 24 November 2023 · consulted 27 September 2026 · in German
  4. ZF 6HP transmissionWikipedia (en) · Other source · consulted 27 September 2026
  5. Fiabilité BMW Série 5 (2003-2010), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  6. Fiabilité Audi A6 (2004-2010), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  7. Fiabilité Audi A8 (2002-2010), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  8. Fiabilité Land Rover Range Rover Sport (2005-2013), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  9. SelespeedWikipedia (inglés) · Other source · consulted 27 September 2026
  10. Lancia YpsilonWikipedia (inglés) · Other source · consulted 27 September 2026
  11. Jaguar XFWikipedia (en) · Other source · consulted 27 September 2026
  12. Fiabilité BMW X3 (2004-2010), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French