The automatic gearbox of a hybrid or plug-in hybrid: maintenance, fluid change and flushing

Not every hybrid has the same kind of automatic. One hybrid has an e-CVT without gears, another has an eight-speed automatic or a DSG with an electric motor built in. This article explains which gearbox belongs to which hybrid, what maintenance the manufacturer prescribes and what we do in the workshop.

By the team at Autobedrijf Willemsbrug, RDW-approved APK (MOT) test station since 1979 · Updated 8 November 2026

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The short answer

Maintenance of the automatic gearbox of a hybrid depends on the type of gearbox. A full hybrid from makes including Toyota and Lexus has an e-CVT with a planetary gear set. Autobedrijf Willemsbrug does not flush it, and its maintenance follows the manufacturer’s schedule.

Many plug-in and mild hybrids have a conventional automatic, such as the hybrid version of the ZF 8HP, or a DSG with an electric motor built in. On those gearboxes our GMTO-certified mechanics change the fluid as prescribed by the manufacturer, after a check of your registration number.

Which types of automatic gearbox are fitted to hybrids?

Broadly speaking, there are four types of gearbox in hybrids: the e-CVT of a full hybrid, a conventional automatic, a DSG and a dedicated hybrid gearbox such as the multi-mode gearbox of the Renault E-Tech. The gearbox your car has determines the maintenance. The table shows the differences.

Type of gearbox Examples Flush? What we do
e-CVT of a full hybrid ExamplesModels including Toyota and Lexus Flush?No What we doMaintenance according to the manufacturer’s schedule, diagnosis if there are complaints
Conventional automatic with electric motor ExamplesHybrid versions of the ZF 8HP, plug-in hybrids with an eight-speed automatic such as the BMW 330e Flush?No, fluid change as prescribed What we doRegistration number check, intake and test drive, fluid change with the prescribed fluid
DSG with electric motor ExamplesModels including the Volkswagen Golf GTE Flush?Not on the flushing machine What we doOil change according to the service schedule of your model
Multi-mode gearbox ExamplesRenault E-Tech Flush?No, we look up the requirement first What we doAccording to the manufacturer’s requirements, call us with your registration number

Overview by Autobedrijf Willemsbrug. Which gearbox your car has depends on the model, engine and year. We look it up using your registration number.

A full overview of the gearboxes we do and do not flush, including those without hybrid drive, is in our article on which automatic gearboxes cannot be flushed.

How does the e-CVT of a Toyota or Lexus hybrid work, and why don’t we flush it?

We do not flush the e-CVT of a full hybrid, because it is a different gearbox from an automatic with a torque converter.

According to the ANWB (the Dutch motoring organisation), hybrids from makes including Toyota and Lexus use a CVT that works with a planetary gear set, a set of gears that divides the power of the combustion engine and the electric motors. It works differently from a standard CVT with a push belt.

The flushing machine and our flushing procedure are designed for automatics with a torque converter, in which the fluid operates the clutches inside the gearbox. The e-CVT works differently. That is why maintenance of the e-CVT follows the manufacturer’s schedule. We look up the requirement for your model using your registration number.

Do you have a CVT without hybrid drive, for example with a push belt? Then we change the CVT fluid as prescribed. You can read about that on our page about CVT flushing and fluid changes.

What is different about the ZF 8HP in a plug-in hybrid?

The hybrid version of the ZF 8HP is a conventional eight-speed automatic with an electric motor added. ZF also builds the fourth generation of the 8HP as a plug-in hybrid version.

According to ZF, the electric motor and the power electronics are then housed in the gearbox casing. ZF started production of this generation in 2022, with two mild hybrid versions. Older plug-in hybrids may have an earlier generation of the 8HP.

An example of a plug-in hybrid with an eight-speed automatic is the BMW 330e. According to BMW, the 330e (model year 2021) comes as standard with an eight-speed Sport Steptronic automatic. We look up which gearbox your BMW or other plug-in hybrid has using your registration number.

Because this gearbox also works with fluid, a fluid change can make sense. Gearbox manufacturer ZF describes its automatics as filled for life, but advises changing the fluid after 150,000 km, and earlier in case of high temperatures, heavy loads or an unknown history.

According to ZF, only approved fluid may be used. You can read more about specifications in our article on which automatic transmission fluid (ATF) your car needs.

For a conventional automatic with a torque converter, our own cautious advice is to change the fluid every 60,000 to 80,000 kilometres. That is not a factory requirement.

On a hybrid we follow the manufacturer’s requirements first. We discuss with you whether an earlier fluid change makes sense, for example if you often tow a trailer or the history is unknown.

What about the DSG of a Golf GTE or another plug-in hybrid?

On a plug-in hybrid with a DSG we change the oil according to the service schedule of your model. We do not connect a DSG to the flushing machine. According to CarAdvice, the electric motor of the Volkswagen Golf GTE is housed in the six-speed DSG. So the gearbox is a DSG with an electric motor inside, not an e-CVT.

Whether and when the DSG oil needs changing differs per gearbox. It is in the service schedule of your model.

Do you have a plug-in hybrid from another make in the Volkswagen Group, such as Audi, Cupra, SEAT or Škoda? In that case, too, we use your registration number to look up which gearbox it is and what the requirement is. How we change the oil of a DSG is explained on our page about DSG oil changes.

Can the gearbox of a Renault E-Tech be flushed?

We do not promise in advance to flush the multi-mode gearbox of the Renault E-Tech. It is a dedicated hybrid gearbox that works differently from an automatic with a torque converter. We follow the manufacturer’s requirements.

Call us with your registration number and we will tell you in advance what the requirement for your Renault is and what we can do.

The same applies to other hybrid gearboxes that are not in the table. In that case, too, we look up the requirement first, before we do anything to the gearbox.

What does the mechanic pay attention to on the automatic of a hybrid?

On a hybrid the mechanic pays attention to two things: the right requirement for the gearbox and working safely around the high-voltage system. Our mechanics hold the GMTO certificate (the Dutch qualification for working on high-voltage systems) for work on hybrid and electric cars. This is how it works with us:

  1. Registration number check: we look up which gearbox your car has, which fluid belongs in it and what the manufacturer prescribes.
  2. Intake and test drive: you tell us what you notice. The mechanic reproduces the complaint, including in electric mode if your car has one.
  3. Fault code reading: where possible, we read the control unit of the gearbox and the hybrid system for stored faults.
  4. Fluid change or check: as prescribed by the manufacturer, with the prescribed fluid. We check the fluid level with the car level and at the specified temperature, following the gearbox manufacturer’s procedure.
  5. Final test drive: after the work, the mechanic checks that the gearbox shifts properly.
Fresh fluid is maintenance, not a repair. It does not fix a fault in the electronics, the electric motor or the high-voltage battery. If a warning for the hybrid system appears, have the car’s fault memory read first.

What does it cost and how do you book?

You get a quote in advance based on your registration number. We only carry out extra work with your approval. Call us on +31 10 479 00 00 or call in at Boterdiep 11 in Rotterdam-IJsselmonde.

You bring the car to us. The car is usually ready the same day, if there is space in our schedule. We call you when it is ready. You can borrow a bike free of charge while one is available. Automatic gearbox flushes and fluid changes are also possible on Saturdays, by appointment (9.00 to 15.00).

More about how we work on automatics is on our page about automatic gearbox flushing in Rotterdam. For other maintenance on your hybrid, see hybrid car service and repair.

Frequently asked questions

Does a Toyota hybrid have a gearbox?

Yes, but not a gearbox with fixed gears. According to the ANWB, Toyota and Lexus hybrids use a CVT that works with a planetary gear set. We do not flush that gearbox. Its maintenance follows the manufacturer’s schedule.

What is the difference between an e-CVT and a CVT?

According to the ANWB, a standard CVT has no fixed gears but a continuously variable ratio. The e-CVT of a full hybrid works with a planetary gear set, which is a different technology. On a standard CVT we change the fluid as prescribed. We do not flush an e-CVT.

Can the automatic transmission fluid of a BMW 330e be changed?

Yes, we change the fluid instead of flushing the gearbox. On a plug-in hybrid with a conventional automatic we do this as prescribed by the manufacturer, after a check of your registration number. We first look up which gearbox your 330e has and which fluid belongs in it. You get a quote in advance.

Does the DSG oil of a Golf GTE need changing?

Yes, if the service schedule of your model requires it. Using your registration number, we look up which DSG your Golf GTE has and what Volkswagen prescribes. We change the oil according to that requirement and do not connect a DSG to the flushing machine.

Can an independent garage work on the automatic of my hybrid?

Yes. You may take your car to an independent garage for maintenance. If your car still has a manufacturer’s warranty or an extended warranty, read your manufacturer’s terms and conditions.

Our mechanics are GMTO-certified for maintenance and diagnosis on hybrid and electric cars. We do not work on the high-voltage battery pack itself. We do not work on the high-voltage battery pack itself. We do not work on the high-voltage battery pack itself.

Does a hybrid shift differently from a car with a standard automatic?

Yes, often it does. A hybrid switches between electric driving, the combustion engine and a combination of both. That can feel different from a standard automatic, and in that case it is not a fault. If you are not sure, have the fault memory read and the car taken for a test drive.

Is a fluid change on a hybrid more expensive than on a standard automatic?

That depends on the gearbox, the amount of fluid and the requirements. Call us with your registration number and you get a quote in advance. We only carry out extra work with your approval.

Maintenance on the automatic of your hybrid?

Call us with your registration number on +31 10 479 00 00. We look up the requirements for your gearbox and you get a quote in advance.

You will find us at Boterdiep 11 in Rotterdam-IJsselmonde, close to Stadion Feijenoord (De Kuip). We work by appointment. For a quick question or check you can walk in without an appointment.

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