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Rough Shifting & Hesitation in my 2019 TLX V6

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Mike T. · rep 0 · May 25, 3:40 AM · 1 replies · solved · Question

Vehicle: 2019 Acura TLX 3.5L V6 Advance

Hey everyone,

I've been noticing some really rough shifts, especially from 2nd to 3rd gear, in my 2019 Acura TLX 3.5L V6 with the 9-speed automatic transmission. It feels like it's hesitating before engaging, and sometimes there's a noticeable jolt. It's not consistent, but it's happening more frequently now.

I've got about 65,000 miles on it, and I'm wondering if this is a common issue with these transmissions or if I should be worried. No warning lights are on yet, but the driving experience is definitely degraded. Has anyone else experienced this?

What could be causing this, and what should I check first before taking it to a shop? Any advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:40 AM

0

ClearTheCode admin answer:

Rough shifting and hesitation in the 9-speed automatic transmission of the 2019 Acura TLX can be a concern, though not always indicative of a major failure immediately. Here's a breakdown of potential causes and steps:

Potential Causes:

  1. Transmission Fluid Issues: Low or degraded transmission fluid (ATF) is a common culprit. Acura's 9-speed is sensitive to fluid condition. Incorrect fluid type can also cause problems.
  2. Transmission Software/Firmware: Acura has released software updates for transmission shifting logic in the past. An outdated module could be causing erratic behavior.
  3. Transmission Solenoids: Shifting solenoids can become sticky or fail, leading to delayed or harsh shifts.
  4. Internal Wear: Less commonly at 65k miles, but internal clutch pack wear or valve body issues could contribute.

Diagnostics & What to Do:

  1. Check Transmission Fluid: Ensure the fluid level is correct and the fluid itself isn't dark or burnt-smelling. This is typically done with the engine warm and running, following specific Acura procedures. If it looks bad, a fluid change might be necessary.
  2. Scan for Codes: Even without a check engine light, a professional scan tool can often pull 'pending' or 'history' codes related to the transmission control module (TCM). Look for codes like P0700 (Transmission Control System Malfunction) or specific solenoid performance codes.
  3. Recall/TSB Check: Verify if your VIN has any open recalls or Technical Service Bulletins (TSBs) related to transmission performance or software updates. Your Acura dealership can check this.

When to See a Shop:

  • Immediately if the problem worsens, a 'Check Engine' or 'Transmission System' warning light illuminates, or if you hear grinding noises.
  • If a fluid change doesn't resolve the issue, or if any diagnostic codes are present, a qualified Acura technician should perform a more in-depth diagnosis. They can perform a transmission software update, test solenoid operation, and inspect for internal wear. Ignoring persistent shifting problems can lead to more severe and costly damage.
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