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Rough Shifting on my 2018 TLX V6 - Is this normal?

0

Mark S. · rep 0 · May 22, 5:01 AM · 1 replies · solved · Question

Vehicle: 2018 Acura TLX V6 A-Spec

Hey everyone,

I've got a 2018 Acura TLX V6 A-Spec with about 65,000 miles on it, and lately, the 9-speed automatic transmission has been shifting really rough. It's most noticeable when going from 1st to 2nd, and sometimes a hard downshift when coming to a stop. It feels clunky and not smooth at all, which is surprising for an Acura.

Is this a common issue with the ZF 9-speed in these models? I've heard some mixed reviews about this transmission. Should I be worried, or is there a known fix like a software update or a specific transmission fluid flush? Any advice would be greatly appreciated before I take it to the dealer.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:01 AM

0

ClearTheCode admin answer:

It sounds like you're experiencing common characteristics of the ZF 9HP transmission found in your 2018 Acura TLX V6. While it's designed for efficiency, its shifting behavior, especially in earlier iterations, has been a frequent topic of discussion among owners.

Here's what you should consider:

  1. Software Updates: Acura has released several software updates for the 9HP transmission over the years to address shifting complaints. These updates aim to refine shift points and smoothness. It's highly recommended to check with an Acura dealership to see if your vehicle has the latest transmission control module (TCM) software installed. This is often the first and most effective step.
  2. Transmission Fluid Service: While Acura specifies a longer interval, some owners and technicians recommend a transmission fluid drain and fill (not a flush) around 60,000-75,000 miles, especially if you're experiencing rough shifts. Using only genuine Acura DW-1 transmission fluid is crucial. A fluid change can sometimes improve shift quality.
  3. Adaptive Learning: The transmission has an adaptive learning process. Sometimes, resetting the transmission's adaptive memory (which a dealer can do) can help it relearn your driving style and improve shifts. This is often done after a software update or fluid change.
  4. Potential Mechanical Issues: While less common, persistent harsh shifting, especially accompanied by warning lights (like a 'Check Engine' light with codes such as P0700 - Transmission Control System Malfunction, or specific gear ratio errors), could indicate a more serious internal issue. This might include solenoid problems or clutch pack wear.

When to See a Shop:

  • If a software update and fluid change don't resolve the issue.
  • If you notice any warning lights on your dashboard.
  • If the shifting becomes erratic, slips, or you hear unusual noises.
  • If you experience a complete loss of a gear or drive.

Start with checking for software updates and consider a fluid service. These are often sufficient to improve the driving experience.

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