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MotorFiable

Dualogic vs ZF 8HP: which gearbox is more reliable?

According to our risk index, the Dualogic gearbox carries less risk than the ZF 8HP gearbox: 29/100 versus 36/100 (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 8HP gearbox has 1 documented serious fault, the main one being «Mechatronic failure as the gearbox ages (sometimes with reverse)».

Risk index

Dualogic

29

Moderate risk · 1 serious fault

Lower risk

Risk index

ZF 8HP

36

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

13 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 8HP gearbox reliable?

The ZF 8HP is an 8-speed torque-converter automatic gearbox, launched in 2008 in the BMW 7 Series and later adopted by BMW, Audi ('tiptronic'), Jaguar, Land Rover, Alfa Romeo and Jeep. It has a reputation for being reliable, although it accumulates jerking that sometimes calls for reprogramming the control unit, occasional mechatronic failures and leaks from the sump gaskets; the oil is sold as 'lifetime', but several garages advise changing it earlier.[4][5][6][7][8]

See the 3 of the ZF 8HP gearbox faults

Side-by-side comparison

Comparison of Dualogic and ZF 8HP
DualogicZF 8HP
Technical data
TypeGearboxGearbox
Gearbox type5-speed automated manual (AMT), single dry clutch, electrohydraulic actuation of the clutch and gear selectionTorque-converter automatic with planetary gearsets, 8-speed, longitudinal mounting
Productionsince 2003[1][9][10]since 2008[4]
Reliability
Risk index (what is it?)29Moderate risk36Moderate 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: Mechatronic failure as the gearbox ages (sometimes with reverse)
  2. Medium severity: Jerking and hesitation when changing gear, sometimes needing reprogramming
  3. Medium severity: Oil leaks from the gearbox gaskets or sump
Most expensive documented repairNo reliable dataup to €3,500Mechatronic failure as the gearbox ages (sometimes with reverse)Published figure[5]
Which versions to buy
BuyRecommended versionsNone
With cautionVersions to be cautious about
  • Dualogic 5-speed (2003-present)[2][3]
  • 1st generation (2008-2013)[5]
  • 3rd generation, with electrification (from 2018)[13]
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 8HP

See the 21 models with the ZF 8HP gearbox

Other comparisons

With the Dualogic gearbox

With the ZF 8HP gearbox

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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 8HP transmissionWikipedia (en) · Other source · consulted 27 September 2026
  5. Fiabilité BMW Série 5 (2010-2016), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  6. Fiabilité BMW X5 (2013-2018), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  7. Fiabilité Jaguar F-Pace, pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  8. Fiabilité BMW Série 1 (2011-2019), 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. Fiabilité BMW X3 (2010-2017), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  12. Fiabilité Audi A6 (2011-2018), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  13. Fiabilité Land Rover Range Rover Sport (2013-2022), pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French