ZF AS-Tronic GS3 Gearbox Shift Modulator / Actuator

Rated 5.00 out of 5 based on 26 customer ratings
(26 customer reviews)

From £550.00

All ZF AS-TRONIC MODULATORS (a.k.a. ZF AS-TRONIC ACTUATORS) are supplied on a purchase-exchange basis.

This simply means that we send you a fully remanufactured bottom half ZF AS-TRONIC MODULATOR and in return, you send the faulty core unit back to us (We prefer and recommend DHL as a courier service as they are fully trackable worldwide).

Your modulator will be delivered wrapped in our special unique protective packaging. In order to reduce our carbon footprint, we recommend that you reuse this packaging to return your faulty core unit back to us.

Once your order is placed, you will receive an email containing the address to send your faulty unit to.

If you have any questions on how this process works, please don’t hesitate to contact us.

More information on ZF AS-Tronic Modulator / Actuator.

Note: This product has an additional £300 surcharge on top of the standard price. This is only until we receive your faulty core unit, at which point this surcharge is immediately refunded.

Note 2: When filling in shipping paperwork, please mark faulty goods for repair with a minimal/no cost value as we are not responsible for paying import duty on received units.


Additional information

Bottom Gasket

None, Bottom Gasket

Sandwich Gasket

None, Sandwich Gasket


18 Months, 24 Months

26 reviews for ZF AS-Tronic GS3 Gearbox Shift Modulator / Actuator

  1. Avatar
    Rated 5 out of 5

    Al Buxton

    We had an Iveco Stralis in our workshop for three weeks losing us money, we rang Shane and he was out to us the same day to collect the actuator and returned it fully working. (E.C.U Issue).
    Excellent work and saved us a fortune on main dealer costs, Would thoroughly recommend Airtronics for a fast turn around at an affordable price.
    Many Thanks
    Al from Derbyshire.

  2. Avatar
    Rated 5 out of 5

    Gavin robinson

    I had an issue with the actuator leaking air on our as tronic gearbox and after talking to Shane about the fault he assured me that his refurbished actuator would have us up and running in no time,
    True to his word he had the item delivered the next day and not only repaired the air leak but made the gear changes smoother
    Extremely friendly service, great product at a great price, would not hesitate to use again
    Thank you Shane

  3. Avatar
    Rated 5 out of 5


    I had lost a lot of money fitting a couple modulators from South Africa, I finally came across ATS. After fitting their unit the truck drives like it is coming from the factory, seamlessly shifting up and down with no hiccup. To anyone thinking twice about ATS, these guys are the really deal they come with real time support for people as far as Zimbabwe like me. Thumps to Shane and co.

  4. Avatar
    Rated 5 out of 5


    Good and clean business ethics by Shane and his promptness and accuracy in delivery made our transaction with him so pleasant. May his tribe increase !!

  5. Avatar
    Rated 5 out of 5

    John Shiels

    I had trouble with a Dennis R Series coach with ZF astronic gearbox, Shane had me sorted in no time. Very helpful, would highly recommend .
    John Shiels

  6. Avatar
    Rated 5 out of 5

    Dave Webster

    Great and efficient service just what you need in the modern transport world can do attitude wins every time delivered the unit for me too to speed up the process all good and fantastic service
    would recommend to anyone

  7. Avatar
    Rated 5 out of 5


    Received a GS3.3 complete unit, this morning very impressed how it arrived, very secure tightly wrapped, it was very clean. great and efficient service.

    I will differently be using Airtronics from now on to test all our Lids, Shane was very helpful and went that extra mile, to help us out.

    I would recommend him.

  8. Avatar
    Rated 5 out of 5


    Dean Abbco Transport Services -1st August 2018
    Collected astronic gearbox module for a daf cf ,very impressed to see the unit looking spanking new like Shane described .
    Fitted the unit when I got back works a treat ,Shane is a top bloke and knows his stuff and a pleasure to deal with Thank you
    Abbco transport will recommend Airtronics to anyone

  9. Avatar
    Rated 5 out of 5

    Benjamin York

    brilliant services from airtronics, and we will be using them again as we couldnt ask for more.

    big thank you from


  10. Avatar
    Rated 5 out of 5

    Jonathan kay

    This is the 2nd time we have used shane to get us back running again. Very reliable and very thorough with all parts of his service! Not many people left like this these days. Certainly went the extra mile to get the unit working again ASAP for us. Would highly recommend to use time and time again. Certainly knows his stuff on the boxes! Talked us through each stage which made it easier to understand and get fixed correctly!
    J & J T transport

  11. Avatar
    Rated 5 out of 5

    scott Hepworth

    We had a problem with a Auto ZF gearbox top we tried our local supplier to repair the part 3 times costing us down time and labour costs in our garage to keep removing and refitting the part which was never fixed. We found Shane on the web and he came out the same day to collect and returned the next day problem sorted at less than half the price from my normal local supplier Shane now gets all our work when required.
    Many thanks
    Custom Haulage Ltd

  12. Avatar
    Rated 5 out of 5

    Chris Wilkins

    Just echoing the reviews of Shane’s other customers. We had a coach with a faulty board which was blowing fuses on our Mercedes coach. We sent the complete modulator in to Shane at Airtronics and are very satisfied with the service we received. Clearly by talking to Shane on the phone you can tell that he is very experienced in his field and gives you confidence that the job is going to be done right. I feel that AirTronics went over and above what was expected to get our modulator up and running again. I hope we don’t have any further modulator problems but if we do, we would definitely be using AirTronics again. Would recommend Shane to anyone with an AS Tronic gearbox.

    Thanks again from Chris at Wilkins Coaches

  13. Avatar
    Rated 5 out of 5


    Old school values, friendly ,helpful and very knowledgeable
    great service fast turnaround i would recommend Shane to anybody having astronic problems
    Thanks again from Simon at BPH Ltd

  14. Avatar
    Rated 5 out of 5

    Paul. Clarke haulage

    Had a problem Friday with oil temp sensor in the modulator. Shane top man come out first thing Saturday morning and sorted it . Truck was back to work at ten o’clock. Excellent service can’t fault, will be using ATS again and would recommend fellow hauliers to try them out. Clarke Haulage Ltd.

  15. Avatar
    Rated 5 out of 5

    Steven lawson

    After having one of our Vanhool TX coaches not been able select any gear, we purchased a re manufactured GS3 modulator from Shane at ATS who kindly delivered it in person. New modulator fitted and now back on the road, the coach drives like a different vehicle, very smooth changes through the box I can’t believe the difference.
    Shane is very helpful and we will definitely use him again for any future failures within our fleet.

    Steven Lawson
    MM Band Services

  16. Avatar
    Rated 5 out of 5

    Jason Mottram

    We had a unit off the road for 3 weeks with what started as a faulty Modulator, then we had a Speed sensor issue with the replacement.
    Shane diagnosed the problem almost immediately, unit was back on the road next day.
    It’s nice to find someone that really knows his stuff, highly recommended and we will defiantly use him again.

    Jason Mottram

  17. Avatar
    Rated 5 out of 5

    Vladimir Hristov

    I operate a haulage company in Bulgaria and have trucks in the U.K. making deliveries all the time. My driver reported that he had lost automatic and could only drive in manual, I found ATS on the internet and contacted Shane who arranged the delivery of a replacement Modulator to a garage in London where my driver would arrive the same day to have the unit fitted.
    The transfer of the payment for the unit was very easy and included the surcharge to be refunded when the faulty unit was sent back. Shane spoke with the mechanics and instructed them on how to fit the Modulator as they were not familiar with fitting this part, the next day Shane arranged the collection of the faulty Modulator and I was refunded my surcharge. The whole process of the purchase, delivery, fitting and return was excellent and I cannot thank Shane enough for his very professional customer service. I would recommend ATS and Shane to all my fellow countrymen and to any other European drivers who have a Modulator fault.
    Many Many thanks Shane.
    Vladimir Georesurs PH Ltd Bulgaria

  18. Avatar
    Rated 5 out of 5


    We are a small passenger transportation (tourist bus rental) company from Lithuania. We have repeatedly encountered problems with the ZF Astronic gearbox shift modulators, that we needed a solution for. Passenger transportation is a very responsible business, and the bus repairs are not easy either, so we needed a reliable and inexpensive solution. And there I found Airtronics Transmission Services with Mr. Shane Collinge (thanks to Google). Nice and businesslike communication, even off workhours (which was surprising for me) has left me with a very good impression. I have never met this person but now I can tell for sure that you can trust him. Thank you, Shane, for a well done job.

    Owner of UAB Arselina,
    Artūras Rozenbergas.

  19. Avatar
    Rated 5 out of 5

    Jamie Cavill

    After being given Shane’s number by a mate one call got the ball rolling with the modulator removed Shane collected it the same day worked on it the following day ,and it was returned the next morning with fitting tips and torque settings . Now it’s fitted it’s like a new truck . One word comes to mind SERVICE thanks Shane for a job well done .

  20. Avatar
    Rated 5 out of 5

    Tony Matthews

    Good service. Shane is very polite and helpful. Turn around is fast replacement unit worked perfect

  21. Avatar
    Rated 5 out of 5

    Aare from Estonia

    Very friendly, helpful and trustworthy.
    If anyone has any doubts…may contact me
    I highly recommend it.
    This customer service is world class gold

  22. Avatar
    Rated 5 out of 5

    Aare from Estonia

    Was experiencing good and polite service, honest hasn’t gotten such good service yet, just super !!!!
    Thank you very much Mr Collinge and I would certainly recommend to others.
    From Aare Estonia.
    Thanks again from Aare Estonia.

  23. Avatar
    Rated 5 out of 5

    Mark Curley

    Struggled with vehicle stuck in Neutral gear. After consulting with different companies and paying for engineers to test the vehicle, we were still none the wiser. At last we were passed the info of ATS and gave them a ring. Shane spoke to me in person and quickly identified the possible causes over the phone. We had the unit with Shane the same day as the diagnosis and it was ready for collection within 24 hours !
    During the fitting process Shane had made it clear that I could ring him with any further questions I had during installing the unit. Shane obviously has extensive knowledge and experience with these gearbox units. He was easy to talk to and clearly laid out the costs and the process of testing the unit.
    The Vehicle now drives perfectly
    Thank you very much Shane 5 stars

  24. Avatar
    Rated 5 out of 5

    Peter Titterington

    We had an air pressure fault with loss of gears on DAF XF euro 6. Shane gave us very good advise and excellent service. The truck was back on the road quickly and at a fraction of the dealer cost.
    I highly recommend.
    Peter Titterington
    Titteringtons Truck and Trailer Services LTD

  25. Avatar
    Rated 5 out of 5

    Mark Mwanza

    I had a problem with my Iveco Euro 5, it had an air low issue and couldn’t engage into neutral. The gearbox was leaking air from the side and I contacted Shane the man. Who was quick in response and after I explained my situation he told me I needed to replace my pneumatic component. After some back and forth I paid for the component 5 days later it was here in Zambia via DHL. Fitted it and the rest is history. Thanks Shane

  26. Avatar
    Rated 5 out of 5

    Oliver Dixon

    Having had a few challenges trying resolve failed gearbox gear selection on a Iveco Stralis I was introduced to Shane from Airtronics. His level of service in both quick response, quality of exchange compents was like a breath of fresh air . Prpoer old school mentality of engineering and customer service.

    Many thanks for all your help and advise.

    Oliver Dixon
    Managing Director

    Olduns Ltd

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