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Rough shifting and hesitation in my 2016 TLX V6

0

Mike T. · rep 0 · May 25, 3:44 AM · 1 replies · solved · Question

Vehicle: 2016 Acura TLX V6 Advance

Hey everyone, I've been noticing some really rough shifting in my 2016 Acura TLX V6 Advance, especially between 2nd and 3rd gear, and sometimes when downshifting. It feels like the car hesitates for a moment before engaging, and the shifts are pretty jarring.

This isn't just a minor annoyance; it's quite noticeable and makes the driving experience less smooth. I'm worried about potential long-term damage to the transmission.

Has anyone else with a 2015-2017 TLX V6 experienced similar issues with their 9-speed automatic? What did you do to resolve it, or what should I be looking for?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:44 AM

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It sounds like you're experiencing a common concern with the ZF 9HP 9-speed automatic transmission found in many 2015-2017 Acura TLX V6 models. These transmissions have been known to exhibit various shifting anomalies.

Causes and Potential Solutions:

  1. Software Updates: The most frequent cause for rough shifting is often related to the transmission control module (TCM) software. Acura has released multiple software updates designed to refine shift logic and improve overall smoothness. This should be your first step.
  2. Transmission Fluid Condition: Over time, transmission fluid can degrade. While Acura specifies a long service interval, sometimes a fluid flush and refill with genuine Acura ATF (DW-1 or Type 3.1) can help, especially if the fluid is dark or smells burnt. Ensure the correct fluid type is used.
  3. Adaptive Learning: The transmission has an adaptive learning process. Sometimes, a reset of the adaptive values, followed by a specific driving procedure, can help the transmission re-learn your driving style and improve shift quality.
  4. Hardware Issues (Less Common but Possible): If software updates and fluid changes don't resolve the issue, it could point to internal transmission components like solenoid issues, valve body problems, or even clutch pack wear. These are more serious and require detailed diagnostics.

When to See a Shop:

  • Immediately if you notice any warning lights on your dashboard (e.g., 'Check Engine' or 'Transmission System'). OBD-II codes like P0700 (Transmission Control System Malfunction) or specific gear ratio errors (e.g., P0730-P0736) would warrant immediate professional attention.
  • If the rough shifting is severe, intermittent, or worsening.
  • If software updates and fluid services performed by a qualified technician do not alleviate the problem.

It's highly recommended to visit an authorized Acura dealership first, as they have the specific diagnostic tools and access to the latest software updates and Technical Service Bulletins (TSBs) related to this transmission.

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