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C7 S tronic with Quattro issues

paultaylor Jun 23, 2018

  1. paultaylor

    paultaylor Member

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    I’m hoping forum members with 7 speed s tronic and in particular combined with Quattro can share good and bad experiences with the twin clutch gearbox.

    What symptoms to look out for etc

    Has anyone had a mechatronics failure even if the oil and filter is changed every 38k miles?

    A specialist told there are actually two filters to be changed but Audi only change one.

    Thanks in advance.
     
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  3. Devilz

    Devilz Active Member Team Moonlight Team V6 VCDS Map User Audi A6 quattro S-line owners group

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    I am having Gearbox overheating warning on dash while driving. Had my car with independent geabox specialist who advised electro magnetic plate kit changing and qouted £1100 + VAT for the job. Had my work with Audi tech who advised servicing gearbox oil should cure the problem.

    My car got 75K on clock right now with stage 1 map for both ECU and TCU. Car is booked for S-tronic gearbox service on 27th. Lets see if this cures the problem.
     
  4. paultaylor

    paultaylor Member

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    Thanks for I info.

    What model is your A6 and what power and torque is it putting out after the remap?
     
  5. Devilz

    Devilz Active Member Team Moonlight Team V6 VCDS Map User Audi A6 quattro S-line owners group

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    Mine is 2012 and its running 333bhp with 780nm.
     
  6. paultaylor

    paultaylor Member

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    Wow. That’s around 100 lb ft of torque more than the Bitdi.

    Is it true they use a conventional automatic on the Bitdi as there is a limit to the amount of torque the s tronic can handle?
     
  7. Devilz

    Devilz Active Member Team Moonlight Team V6 VCDS Map User Audi A6 quattro S-line owners group

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    BiTdi is 8 speed tiptronic. As per the manual, the maximum torque for s-tronic is 600nm.
     
  8. paultaylor

    paultaylor Member

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    [​IMG]

    I had a DSG expert change the gear of fluid and both filters.

    No error codes and no software updates due.

    Best to eliminate the potential for any wear and know that it has fresh oil filters.
     
    Spiedhermonkey likes this.
  9. evans1089

    evans1089 Active Member

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    Name of expert?


    Sent from my iPhone using Tapatalk
     
  10. paultaylor

    paultaylor Member

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    Cassidy in western industrial estate Dublin. They know DSG inside out and fixed the mechatronics on my wife’s A3.

    Ask for Richie
     
  11. evans1089

    evans1089 Active Member

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    Was hoping it was a little closer lol


    Sent from my iPhone using Tapatalk
     
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  13. paultaylor

    paultaylor Member

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    How did the DSG oil service go?
     
  14. Devilz

    Devilz Active Member Team Moonlight Team V6 VCDS Map User Audi A6 quattro S-line owners group

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    For first 2 days it was fine, no warning on dash but now it's same. Keep popping the warning everytime I lift and press the throttle
     
  15. Stokka

    Stokka Member

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    i'm not at all sure here but know i'll be corrected if i am wrong.
    does this box have a cooler thermostat for the gearbox like the passat ? they can stick and cause weird stuff on the VW
     
  16. paultaylor

    paultaylor Member

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    How do the changes feel? Particularly going from 1 to 2 and then from 3 down to 2
     
  17. Devilz

    Devilz Active Member Team Moonlight Team V6 VCDS Map User Audi A6 quattro S-line owners group

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    There are no issues while driving with gear changes. It's just pops up and go away. It doesn't even store error in module.

    I'm pretty certain it's sensor issue. But struggling to find garage who will look at it as not too many transmission specialists in Birmingham area
     
  18. BahnStormer77

    BahnStormer77 BahnStormer

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    @Devilz Walton Audi know at least one DSG gearbox inside out.... mine!

    Dig through the chat history: mine is on the same STronic box as the low/mid end TDI's and it failed almost exactly 3 years ago - no oil change history required: it was at <8000miles, 3yrs and 3 days old... and that's on a supercharged TFSI PRE-remap*, so NOT a lot of torque compared to oil-burners - only slightly more than a 2.5TDI/2.7TDI, similar to the lower end 3.0TDI. My A6 has a full Audi Service History and was completely stock at the time of failure.

    *Even after the remap the torque wouldn't have been a problem for mine - the TFSI's are very different beasts to remap compared to TDIs - you don't touch the low RPM torque and peak torque (much!) - it just doesn't bleed supercharger boost pressure prematurely and holds most of that 440Nm to 7000rpm now :)....

    When it failed: as soon as the DSG tried to shift up to 2nd, it disabled that half of the gearbox and it just disabled gears 2,4,6,R. I had to drive it in "Sport", to get it to rev out so it didn't bog down on each upshift as it was going 1-3-5-7.... AND I had to turn the car off and restart to get into reverse, three point turns were a PAIN. Text book Mechatronic failure.

    Turns out that there's a known problem with the S-Tronics up to about 2015: all related to why Audi did a full safety recall on the S5's and S4's in North America** and why they only put the STronic in the 204PS V6 TDI, never the 240-270-ish PS TDI's until that issue was resolved - there is a re-designed mechatronic unit on the later models (and on all recalled cars) - apparently should be good for a LOT more torque, but I'm not sure how much - if you were considering remapping a TDI - torque isn't an issue for my remap :)

    **not clear why they didn't actual recall elsewhere, but there were a couple of reports in the US of S5's completely seizing up in the middle of highways! (cue Fight Club-style conversation about publicity/compensation, etc)....

    And in reference to the BiTDI's - they've always been on the ZF 8-speed and probably always will as they can handle a LOT of torque - pretty sure that's the same drivetrain that's used in the 4.2TDI in the A8/Q7.
     
    Last edited: Jul 16, 2018 at 10:18 AM
  19. paultaylor

    paultaylor Member

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    Is it safe to say the 2015 facelift 272 3.0tdi has the revised s tronic gear box ?

    Thanks
     

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