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Transmission Jerking/Hesitation in 2020 S5 Cabriolet

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Mike T. · rep 0 · May 26, 3:48 AM · 1 replies · solved · Question

Vehicle: 2020 Audi S5 Cabriolet Prestige

I'm experiencing some concerning transmission behavior in my 2020 Audi S5 Cabriolet Prestige. When accelerating from a stop, especially after the car has been sitting for a bit, there's a noticeable jerk or hesitation before it smoothly engages. It feels like it's struggling to find the right gear for a second or two.

This isn't a constant issue, but it's happening more frequently now, maybe a few times a week. It's particularly noticeable in stop-and-go traffic. Once it's moving, the shifts feel fine, but that initial engagement is becoming quite jarring.

Is this a known issue with the S tronic transmission in the B9.5 S5? I'm worried it might be a sign of a bigger problem. Any thoughts or similar experiences would be helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:48 AM

0

ClearTheCode admin answer:

Transmission jerking or hesitation from a stop in a 2020 Audi S5 Cabriolet, which uses the 8-speed Tiptronic (ZF 8HP) automatic transmission, can be a cause for concern. While the S5 Sportback and Coupe use the S tronic (DSG) in some markets, the Cabriolet in the US typically uses the Tiptronic. Here's what to consider:

  1. Check for Software Updates: Transmission control module (TCM) software updates are often released to address shifting anomalies and improve overall transmission behavior. This is a common first step for dealerships.
  2. Adaptive Learning Reset: Sometimes, the transmission's adaptive learning values can become skewed. A dealership or a specialized shop with proper diagnostic tools can perform an adaptive learning reset, allowing the transmission to relearn optimal shift points.
  3. Fluid Level/Condition: Although the ZF 8HP is considered 'sealed for life' by Audi, the fluid can degrade over time and mileage, especially under heavy use. While not a user-serviceable item, a technician can check the fluid level and condition, though a full fluid and filter service is typically recommended around 60k-80k miles, not usually at your mileage.

Common Causes:

  • TCM Software Glitches: The most common cause for new-ish transmissions exhibiting odd behavior is often a software issue that can be corrected with an update.
  • Mechatronics Unit Issues: The mechatronics unit, which integrates the transmission's electronic control unit and valve body, can sometimes develop issues, leading to erratic shifting. This is a more serious and costly repair.
  • Worn Clutch Packs (less likely for Tiptronic, more for S tronic): While less common for the Tiptronic at your mileage, internal wear could cause engagement issues.

When to See a Shop: Given the complexity of modern automatic transmissions, if software updates or an adaptive reset don't resolve the issue, it's crucial to have your Audi S5 inspected by an authorized Audi dealership or a transmission specialist. They can perform advanced diagnostics, including reading transmission-specific fault codes (e.g., P07xx series codes related to solenoids, pressure, or gear ratios) and conducting road tests to accurately diagnose the problem. Ignoring transmission issues can lead to more severe and expensive damage.

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