Welcome to Airtronics Transmission Services

We are specialists in the repair of ZF AS-Tronic Modulators found inside the gearbox of DAF, MAN, and IVECO Trucks.

As we are experts in our craft, we guarantee you a fantastic service, all at the lowest price around. Not only that, we also provide you with a 18 month warranty on all remanufactured units that we supply.

ZF AS-Tronic Actuator

“We don’t claim to be the best…
Our customers tell us we are!
Please read our reviews from customers
all over the world in our reviews section.”

Now selling complete ZF AS-Tronic units with ECU

ZF AS-Tronic Modulator with ECUAirtronics Transmission Services is proud to inform all customers that due to a high demand for complete units, we can now offer a ZF AS-Tronic Modulator complete with a genuine original ECU board fully programmed to DAF, MAN or IVECO vehicles.

Please contact us with your specific requirements.

All sales are on a purchase exchange basis.


As featured on YouTube

Shane from ATS collaborated with the popular YouTuber Chris Allen – Professional Struggler to talk about ZF AS-Tronic modulators/actuators with the aim of taking the fear and the mystery out of refitting them.

Watch the video to learn a thing or two about these units. Understand the do’s and don’ts and let Shane walk you through the whole process of fitting them correctly.

If you enjoyed this video, make sure to subscribe to Chris’ YouTube channel for more similar content.

Please note: This video was released in 2022. Any quotes or prices mentioned in the video are subject to change due to global price increases on parts.



Unsure if you need a bottom pneumatic section of your modulator?


Are you unsure as to whether you need a bottom pneumatic section of your modulator? Have you been told you might need a new gasket kit? Has your ECU board gone faulty and you are not sure if you require a complete unit?

Before you part with your hard earned cash why not have us check your unit first?

Our dedicated software will enable us to access the modulator’s ECU board and read the stored error messages inside.

If your unit is tested, found to be faulty and you wish to purchase a replacement: The test is free!

If your unit is tested and found to have an unrelated issue: You only pay for the test!

Paying Too Much For Transmission Repairs?

We understand that transmission repairs are expensive, especially for custom parts. We are here to change that. We offer a top quality repair service of ZF-AS Tronic Modulators at an affordable price.

Customer satisfaction is our number one priority and it is what we pride ourselves on. We never let a unit leave our workshop unless it is in excellent condition and also offer a 18 month warranty to go with it.

All our modulators are fully stripped down to their component parts and thoroughly cleaned before being assessed for damage. Any worn or broken parts are replaced using genuine ZF and WABCO parts.

Finally, all units are tested and work to the parameters set by the manufacturer including the latest up to date recommended specifications. No unit leaves the workshop unless it meets our stringent testing process.

What We Can Offer


We are true specialists in what we do and want to offer our services at the lowest cost to you. Replacement modulators are only £650. We only provide you with the highest quality units with ZF and WABCO parts. All come fully tested and work to the parameters set by the manufacturer including the latest up to date recommended specifications.


We believe in the excellent quality of our units, but should anything go wrong, don't worry! We provide you with 18 months warranty on all units supplied by us.


We aim to be completely transparent with our pricing. See all our prices right here on our site and if you aren't sure about something, don't hesitate to get in contact so that we can provide you with an upfront, honest price without the jargon.


Customer satisfaction is our number one priority! Therefore we make sure that you receive your fully remanufactured modulator as soon as we can possibly get it to you. Generally orders are dispatched on the same day they have been ordered, and your old unit collected or returned in the secure packaging that we deliver your unit in.