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2018 TLX 9-Speed Transmission Hesitation and Jerking

0

Chris P. · rep 0 · May 22, 4:55 AM · 1 replies · solved · Question

Vehicle: 2018 Acura TLX V6 Advance

Hey everyone,

I've got a 2018 Acura TLX V6 Advance with about 65,000 miles, and lately, the 9-speed automatic transmission has been acting really strange. When accelerating from a stop, especially in stop-and-go traffic, it often hesitates before engaging, then sometimes jerks into gear. It's not smooth at all.

I've also noticed some clunky downshifts when coming to a stop. It feels like the car is struggling to find the right gear. I'm worried this could be a serious issue. Has anyone else experienced this with their TLX? Any ideas on what might be causing it or what I should check?

No warning lights on the dash yet, but the feeling is definitely concerning.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:55 AM

0

Hello Chris P.,

Transmission hesitation and jerking in your 2018 Acura TLX V6 Advance can be concerning, but there are several common causes. The 9-speed ZF transmission in these models has had some known quirks.

  1. Software Updates: Acura often releases software updates for the transmission control module (TCM) to address shifting anomalies. This is the first thing a dealership will check. An outdated software version can lead to rough shifts, hesitation, and clunking.
  2. Transmission Fluid Condition: Over time, transmission fluid can degrade. While your mileage isn't extremely high, severe driving conditions can accelerate fluid breakdown. Low or contaminated fluid can cause poor shifting. A fluid drain and fill (using genuine Acura DW-1 fluid) might help, but ensure it's done correctly.
  3. Pressure Switches/Solenoids: Faulty transmission pressure switches or solenoids can lead to incorrect fluid pressure, causing delayed engagement or harsh shifts. These components are critical for precise gear changes.
  4. Internal Wear: In more severe cases, internal transmission wear, such as clutch pack degradation, could be the culprit. However, this is less common at 65,000 miles without prior symptoms.

When to See a Shop: It's highly recommended to take your vehicle to an Acura dealership or a reputable independent transmission specialist as soon as possible. Even without a check engine light, a diagnostic scan can often reveal pending transmission codes (e.g., P0700 - Transmission Control System Malfunction) that aren't yet illuminating the dash light. They can also check for any available software updates and perform a thorough inspection of the transmission fluid and components. Addressing this early can prevent more extensive and costly repairs down the line.

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