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2018 Pacifica Rough Shifting & Hesitation - Reliability Concerns?

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Sarah K. · rep 0 · May 22, 5:59 AM · 1 replies · solved · Question

Vehicle: 2018 Chrysler Pacifica Touring L

Hey everyone,

I've got a 2018 Chrysler Pacifica Touring L with about 65,000 miles on it, and lately, I've been noticing some really rough shifts, especially between 2nd and 3rd gear, and sometimes a noticeable hesitation when accelerating from a stop. It feels like the transmission is struggling to find the right gear, and it's not always smooth.

Is this a common issue with the 9-speed transmission in these Pacificas? I'm starting to get worried about the long-term reliability of the vehicle, as this is our main family hauler. I've heard some chatter online about these transmissions, but I'm not sure if it's just normal quirks or something I should be seriously concerned about.

Has anyone else experienced this with their 2018 Pacifica or similar model years? What did you do to address it, and what was the outcome? Any advice on whether this is something that needs immediate attention from a dealership or an independent shop would be greatly appreciated. Thanks!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:59 AM

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ClearTheCode admin answer:

It's understandable to be concerned about rough shifting and hesitation, especially in a family vehicle like your 2018 Chrysler Pacifica Touring L. The 9-speed ZF automatic transmission used in these models has been known to exhibit some characteristic behaviors, including occasional rough shifts or hesitation, particularly in earlier model years.

Here's what you should consider:

  1. Common Causes:

    • Software Calibration: Often, these issues stem from the transmission control module (TCM) software calibration. Chrysler has released several Technical Service Bulletins (TSBs) over the years to address shifting concerns through software updates.
    • Transmission Fluid: Low or degraded transmission fluid can also contribute to poor shifting performance.
    • Valve Body Issues: In some cases, issues with the transmission's valve body can cause inconsistent fluid pressure, leading to rough shifts.
    • Adaptive Learning: Automatic transmissions learn your driving style. Sometimes, a transmission reset (which can be done by a professional) can help it 're-learn' optimal shift points.

  2. When to See a Shop:

    • Check Engine Light: If your Check Engine Light illuminates, it's crucial to get the vehicle scanned for diagnostic trouble codes (DTCs). Common transmission-related codes might include P0734 (Gear 4 Incorrect Ratio), P0735 (Gear 5 Incorrect Ratio), or other gear ratio error codes.
    • Persistent & Worsening Issues: If the rough shifts are consistent, worsening, or accompanied by slipping, grinding noises, or a complete loss of a gear, immediate professional diagnosis is necessary.
    • Fluid Leaks: Any signs of transmission fluid leaks should be addressed promptly.

  3. What a Shop Will Do:

    • Diagnostic Scan: They will scan for any stored fault codes.
    • TSB Check: A reputable shop or dealership will check for any applicable TSBs for your specific VIN that address transmission shifting issues. A software update is often the first step.
    • Fluid Inspection: They will check the transmission fluid level and condition.
    • Test Drive & Further Diagnosis: If software updates don't resolve the issue, they may perform further diagnostics, potentially including pressure tests or internal inspection if severe issues are suspected. It's often recommended to start with the least invasive and costly solutions first.
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