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Rough Shifts and Hesitation in my 2018 SQ5 Prestige - Transmission Issue?

0

Mike T. · rep 0 · May 26, 3:49 AM · 1 replies · solved · Question

Vehicle: 2018 Audi SQ5 Prestige

Hey everyone,

I've been noticing some concerning behavior from my 2018 Audi SQ5 Prestige lately. When accelerating, especially from a stop or at lower speeds, the transmission feels like it's hesitating or slipping before engaging, and the shifts themselves can be quite rough, almost like a jolt. It's not consistent, but it's happening more frequently now.

Sometimes, it feels like the car struggles to find the right gear, and there's a noticeable delay. I'm worried this could be a serious transmission problem. Has anyone else experienced anything similar with their SQ5? What could be causing this?

I'm planning to take it to the dealer soon, but wanted to get some community input first. Any advice or shared experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:49 AM

0

ClearTheCode admin answer:

Rough shifts and hesitation in your 2018 Audi SQ5 Prestige can be indicative of several underlying issues. Given the symptoms, it's wise to address this promptly.

1. Initial Diagnostics & Checks:

  1. Scan for Codes: Use an OBD-II scanner to check for any stored diagnostic trouble codes (DTCs), especially transmission-related codes like P0700 (Transmission Control System Malfunction) or specific Audi manufacturer codes related to the mechatronics unit or clutch packs.
  2. Check Transmission Fluid (if applicable): While many modern Audi transmissions are sealed, some still have inspection points. Low or degraded transmission fluid can cause shifting issues. This is usually a dealer-only check.
  3. Note Driving Conditions: Pay attention to when the issue occurs (cold start, hot engine, specific gears, uphill/downhill) as this can help narrow down the diagnosis.

2. Common Causes:

  • Mechatronics Unit Failure: This is a common point of failure in Audi's S-Tronic (DSG) transmissions. The mechatronics unit controls the clutch engagement and gear shifts, and issues here can lead to rough shifts, hesitation, or complete transmission failure.
  • Clutch Pack Wear: Over time, the wet clutch packs can wear out, leading to slipping and delayed engagement, especially under load.
  • Software Glitches: Sometimes, a simple software update for the Transmission Control Unit (TCU) can resolve minor shifting anomalies.
  • Sensor Malfunctions: Sensors within the transmission (e.g., speed sensors, temperature sensors) can send incorrect data to the TCU, leading to improper shifting.
  • Engine-Related Issues: Less common, but sometimes engine misfires or turbocharger issues can manifest as transmission-like symptoms due to power delivery problems.

3. When to See a Shop:

It is highly recommended to have your SQ5 inspected by an Audi specialist or dealership as soon as possible. Continuing to drive with these symptoms can exacerbate the problem and potentially lead to more extensive and costly repairs.

  • Immediately if you notice any new warning lights on your dashboard (especially a 'Check Engine' light or transmission warning).
  • As soon as you can schedule an appointment if the symptoms are consistent and affecting drivability.

An Audi technician will be able to perform a comprehensive diagnostic scan, check live data from the TCU, and potentially perform tests on the mechatronics unit or clutch engagement to pinpoint the exact cause.

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