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2020 Durango R/T - Rough 8-speed transmission shifts, especially 2nd to 3rd

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Mike T. · rep 0 · May 25, 4:15 AM · 1 replies · solved · Question

Vehicle: 2020 Dodge Durango R/T

I'm having some frustrating issues with the 8-speed automatic transmission in my 2020 Dodge Durango R/T. It's got about 45,000 miles on it, and recently, I've noticed very rough and sometimes delayed shifts, particularly when going from 2nd to 3rd gear. It feels like a jolt or a hesitation before it finally engages.

This happens most often when the transmission is cold, but it can also occur during normal driving conditions, especially under light to moderate acceleration. There's no check engine light on, and no warning messages on the dash. The fluid level appears to be fine, though I haven't had it professionally checked.

Is this a known issue with the ZF 8HP transmission in the Durango? Could it be a software update needed, or something more serious? Any insights from other 2020 Durango owners would be great. Thanks for your help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:15 AM

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Rough or delayed shifts in the ZF 8HP transmission, commonly found in your 2020 Dodge Durango R/T, can be a concern. While these transmissions are generally robust, they are also highly sophisticated and rely heavily on precise electronic control. Several factors could contribute to the symptoms you're experiencing.

Here are the common causes and steps to consider:

  1. Software Glitch/Update: Often, harsh or inconsistent shifting can be resolved with a transmission control module (TCM) software update. Manufacturers frequently release updates to refine shift logic, address known issues, and improve overall performance and longevity. This is a common first step for dealerships.
  2. Low or Contaminated Fluid: Even if the fluid level appears fine, it's crucial to ensure it's at the correct level and condition. These transmissions are sensitive to fluid quality and level. A professional check will involve:
    • Checking the fluid level at the correct operating temperature.
    • Inspecting the fluid for signs of contamination or burning.
  3. Adaptive Learning Resets: The transmission's computer 'learns' your driving style. Sometimes, resetting these adaptive values can help, especially after a software update or if driving habits have changed significantly.
  4. Internal Component Wear: Less commonly, but possible at higher mileage, internal components like solenoids or clutch packs could be wearing. However, without any diagnostic trouble codes (DTCs) like P07xx series, this is usually considered after ruling out software and fluid issues.

When to See a Shop: You should schedule an appointment with a Dodge dealership or a reputable transmission specialist soon. Even without a CEL, a professional diagnostic scan can reveal pending codes or detailed transmission data that might indicate a problem. Addressing this early can prevent more significant damage to the transmission. Request they check for any available TCM software updates and perform a thorough transmission fluid inspection.

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