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Rough Shifting & Hesitation in 2017 Audi A4 Prestige (S tronic)

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Mike T. · rep 0 · May 26, 3:41 AM · 1 replies · solved · Question

Vehicle: 2017 Audi A4 Prestige

Hi everyone,

I've been noticing some concerning behavior from the transmission in my 2017 Audi A4 Prestige with the S tronic (DSG) gearbox. Specifically, I'm experiencing rough shifts, particularly at lower speeds and when downshifting. It feels like the car hesitates or jerks a bit, especially when coming to a stop or accelerating gently from a low speed.

It's not constant, but it's happening more frequently now, and it's making the car feel less refined than it should. I'm worried it might be a sign of a bigger problem. The car has about 65,000 miles on it.

Has anyone else with a B9 A4 experienced similar transmission issues? What was the cause, and how was it resolved? Any insights would be really helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:41 AM

0

ClearTheCode admin answer:

Rough shifting and hesitation in Audi's S tronic (DSG) transmissions can be a cause for concern, but there are several potential culprits. Here's what you should know:

1. Common Causes:

  • Mechatronics Unit Failure: This is a common issue in some S tronic transmissions. The mechatronics unit is the brain of the DSG, controlling clutch engagement and gear selection. Faults here can lead to erratic shifting.
  • Low or Contaminated Transmission Fluid: The S tronic requires specific fluid changes at regular intervals. Incorrect fluid levels or old, contaminated fluid can severely impact shift quality.
  • Clutch Pack Wear: Over time, the clutch packs can wear, leading to slipping or rough engagement, especially noticeable at lower speeds.
  • Software Adaptation Issues: Sometimes, the transmission control module (TCM) might need a software update or a basic settings adaptation to relearn shift points.

2. Diagnostic Steps & Solutions:

  1. Check for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to check for codes. Common codes related to S tronic issues include:
    • P0700: Transmission Control System Malfunction (general code, often accompanied by more specific codes)
    • P17D8: Torque Limitation Due to Clutch Temperature (can indicate clutch wear or mechatronics issues)
    • P2711: Unexpected Mechanical Gear Disengagement
    • P17BF: Hydraulic Pump Play Protection (Mechatronics fault)
  2. Transmission Fluid Service: Confirm if your 65,000-mile A4 has had its S tronic fluid and filter changed. This is a critical maintenance item, typically due around 40,000 miles. If not, this should be your first step.
  3. Software Update/Adaptation: An Audi dealership can check for any available software updates for your Transmission Control Module (TCM) and perform a basic settings adaptation, which can sometimes smooth out shifting.

3. When to See a Shop:

  • Immediately if you have recurring warning lights (e.g., Check Engine Light, EPC light, or transmission warning light).
  • If the problem worsens or becomes consistent.
  • If you find any of the specific OBD-II codes mentioned above.
  • Given the complexity of S tronic transmissions, it's highly recommended to have an Audi-specific specialist or dealership diagnose and repair these issues. They have the specialized tools and expertise to properly assess the mechatronics unit, clutch packs, and perform necessary adaptations.
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