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2020 Audi A6 S-Tronic Transmission Hesitation/Jerking

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Chris P. · rep 0 · May 22, 4:32 AM · 1 replies · solved · Question

Vehicle: 2020 Audi A6 3.0T Prestige

I've been experiencing some concerning behavior with the S-Tronic transmission in my 2020 Audi A6 3.0T. Specifically, I've noticed a hesitation or slight jerkiness when accelerating from a stop, particularly in lower gears (1st to 2nd, or 2nd to 3rd). It's not constant, but it's frequent enough to be noticeable and frankly, a bit worrying.

Sometimes it feels like the clutch is slipping for a moment before engaging fully. I've tried driving in different modes (Comfort, Dynamic), but the issue persists. Is this a common characteristic of the S-Tronic (DSG) transmission, or could it be a sign of a developing problem? Are there any known TSBs for this model year regarding transmission performance?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:32 AM

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ClearTheCode admin answer: The symptoms you're describing – hesitation and jerking during low-speed acceleration or gear changes – are unfortunately not uncommon with Audi's S-Tronic (dual-clutch or DSG) transmissions, especially in the 2020 A6 3.0T. While some degree of 'characteristic' behavior can be present with dual-clutch units, persistent or worsening jerking can indicate an issue.

Potential Causes:

  1. Mechatronic Unit Issues: The mechatronic unit is the brain of the S-Tronic transmission, controlling clutch engagement and gear selection. Faults within this unit (e.g., solenoid issues, pressure problems) are a common cause of rough shifts or hesitation.
  2. Clutch Pack Wear: While less likely on a 2020 model unless it has very high mileage or has been driven aggressively, wear in the clutch packs can lead to slipping or harsh engagement.
  3. Software Calibration: Sometimes, the transmission control module (TCM) software can be out of date or require recalibration. Audi often releases software updates to refine shift logic and improve smoothness.
  4. Transmission Fluid (ATF) Issues: Incorrect fluid levels or degraded fluid quality can impact transmission performance, though S-Tronic fluid changes are typically on a longer interval.

Known TSBs/Recalls: It's worth checking with your Audi dealer for any Technical Service Bulletins (TSBs) or software updates related to the S-Tronic transmission for your specific 2020 A6 model. TSBs often address known issues like rough shifting or hesitation with specific software fixes or component replacements.

When to See a Shop:

  • Promptly: If the jerking or hesitation is consistent, worsening, or accompanied by any warning lights (e.g., a flashing gear indicator or Check Engine Light).
  • A specialized Audi technician should perform a diagnostic scan using factory tools (like ODIS). This can reveal specific fault codes related to the transmission control module (TCM), such as P0700 (Transmission Control System Malfunction) or more specific codes indicating mechatronic or clutch issues. They can also check for available software updates and perform a basic settings adaptation for the transmission, which can sometimes resolve minor issues.
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