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2016 TLX V6 9-Speed Transmission Shifting Rough - Is this normal?

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Chris P. · rep 0 · May 22, 5:01 AM · 1 replies · solved · Question

Vehicle: 2016 Acura TLX V6 Advance

Hey everyone,

I've got a 2016 Acura TLX V6 with about 70,000 miles, and lately, the 9-speed automatic transmission has been acting really strange. It often shifts harshly, especially between 1st and 2nd, and sometimes hesitates when downshifting.

I've read a bit online about these transmissions having issues, but I'm not sure if what I'm experiencing is 'normal' for this model or if it's a sign of a bigger problem. Has anyone else with a 2016 TLX V6 experienced similar rough shifting? Should I be worried?

Any advice on what to check or ask my mechanic would be greatly appreciated. Thanks!

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

Rough shifting in the ZF 9HP transmission, common in early 2016 Acura TLX V6 models, is a known concern. Here's what you should know:

  1. Software Updates: Acura released several software updates (TSBs) to address shifting logic and smoothness. Your first step should be to check if your vehicle has the latest transmission control module (TCM) software. A dealership can perform this check and update if necessary.
  2. Transmission Fluid: Ensure the transmission fluid is at the correct level and has been serviced according to Acura's maintenance schedule. While often considered 'lifetime,' fluid degradation can contribute to shifting issues. A drain and fill with genuine Acura DW-1 fluid might help.
  3. Causes:
    • Software Glitches: The most common cause is the original programming struggling with optimal shift points and pressures.
    • Fluid Condition: Old or low fluid can reduce lubrication and hydraulic pressure, leading to harsh shifts.
    • Solenoid Issues: Less common, but faulty shift solenoids within the valve body can cause inconsistent shifting.
  4. When to See a Shop:
    • Immediately if you experience warning lights (e.g., 'Check Engine' or transmission warning), complete loss of gear, or grinding noises.
    • Soon if software updates and fluid changes don't resolve the issue, or if the problem worsens. A qualified Acura technician can perform advanced diagnostics, including checking for specific OBD-II codes related to transmission performance (e.g., P0700 - Transmission Control System Malfunction, P0731-P0736 - Incorrect Gear Ratio).

It's crucial to address these concerns promptly to prevent potential long-term damage to the transmission.

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