ZF AS-Tronic GS3 Gearbox Shift Modulator

Rated 5.00 out of 5 based on 15 customer ratings
(15 customer reviews)

From £600.00

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.

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.

Note: This product has an additional £400 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.
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Additional information

Bottom Gasket

None, Bottom Gasket

Sandwich Gasket

None, Sandwich Gasket


18 Months, 30 Months

15 reviews for ZF AS-Tronic GS3 Gearbox Shift Modulator

  1. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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

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