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2020 Durango GT Transmission Shifting Hard - P07XX Codes?

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Kevin B. · rep 0 · May 22, 5:39 AM · 1 replies · solved · Question

Vehicle: 2020 Dodge Durango GT

Hi all,

I'm experiencing some concerning transmission behavior with my 2020 Dodge Durango GT, 3.6L V6. Over the past few weeks, the shifts have become noticeably harsher, especially from 1st to 2nd and sometimes 2nd to 3rd. It feels like it's slamming into gear rather than smoothly transitioning.

Occasionally, there's a slight delay when shifting into drive or reverse after starting the car. I haven't seen a check engine light yet, but I'm worried it's coming. I've heard about transmission issues on these models, and I'm wondering if anyone has dealt with similar symptoms.

Could this be a sensor issue, low fluid, or something more serious? I'm trying to get ahead of it before it becomes a bigger problem. Any insights or common OBD codes related to this would be helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:39 AM

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ClearTheCode admin answer:

Hard shifting and delayed engagement in your 2020 Dodge Durango GT are symptoms that definitely warrant attention, even without an immediate Check Engine Light. These issues often point to problems within the transmission system. Here's what to consider:

  1. Initial Checks:

    • Transmission Fluid Level and Condition: This is the first and easiest check. Low or dirty transmission fluid can cause significant shifting problems. Refer to your owner's manual for the correct fluid type and checking procedure. If the fluid is dark, smells burnt, or is low, it needs immediate attention.
    • Battery Condition: A weak or failing battery can cause a multitude of electrical glitches, including erratic transmission behavior, as the Transmission Control Module (TCM) relies on stable voltage.

  2. Potential Causes & Related Codes:

    • Transmission Control Module (TCM) Software: Sometimes, a simple software update or reflash of the TCM can resolve shifting anomalies. Dealerships often have updates for known issues.
    • Solenoid Issues: The transmission uses solenoids to control fluid flow and engage gears. Faulty solenoids can cause harsh shifts or delays. If a Check Engine Light comes on, you might see codes like P0750 (Shift Solenoid A Malfunction), P0755 (Shift Solenoid B Malfunction), or other P07xx series codes.
    • Valve Body Problems: The valve body directs hydraulic fluid to the clutches and bands. Wear or blockages in the valve body can lead to shifting issues.
    • Internal Wear: In more severe cases, internal wear of clutches or other components can cause these symptoms.

  3. When to See a Shop:

    • Immediately: If the problem worsens, you hear grinding noises, or the vehicle refuses to shift gears.
    • If Fluid Check is Inconclusive: If the fluid level and condition seem fine, but the problem persists, a professional diagnosis is needed.
    • For Diagnostic Scans: Even without a Check Engine Light, a professional scan tool can often read pending codes or specific transmission diagnostic trouble codes (DTCs) that a generic OBD-II scanner might miss. A dealership or a reputable transmission specialist can perform this and check for any available TCM software updates. Ignoring these symptoms can lead to more extensive and costly transmission repairs down the line.
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