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2017 MDX 9-Speed Transmission Jerking and Hard Shifts

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Sarah K. · rep 0 · May 26, 3:30 AM · 1 replies · solved · Question

Vehicle: 2017 Acura MDX Advance

Hey everyone,

I've got a 2017 Acura MDX Advance with the 9-speed automatic, and lately, the transmission has been acting really strange. It often feels like it's jerking, especially when downshifting at lower speeds or when accelerating from a stop.

Sometimes, it's a really harsh shift, almost like someone bumped me from behind. It's not consistent, but it's happening more frequently now. I'm worried this could be a serious issue.

Has anyone else experienced similar transmission problems with their MDX of this generation? What was the fix? Any advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:30 AM

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ClearTheCode admin answer:

It sounds like you're experiencing common issues associated with the ZF 9-speed automatic transmission found in earlier 3rd-generation Acura MDX models. These transmissions have been known to exhibit harsh shifting, hesitation, and jerking.

  1. Check for Software Updates: The first step is to check if your vehicle has any outstanding transmission control module (TCM) software updates. Acura released several updates to address shifting characteristics. A dealership can perform this check and update if necessary.
  2. Transmission Fluid Condition: While less common for jerking, ensure your transmission fluid is at the correct level and condition. Old or low fluid can contribute to poor shifting. Acura recommends specific fluid (DW-1) and a specific change interval.
  3. Adaptive Learning Reset: Sometimes, resetting the transmission's adaptive learning values can help. This allows the transmission to re-learn your driving style. This is typically done by a dealership or a shop with advanced diagnostic tools.
  4. Diagnostic Trouble Codes (DTCs): If the issue is severe, it might trigger a Check Engine Light. Common OBD-II codes related to transmission issues include P0700 (Transmission Control System Malfunction) or P0730 (Incorrect Gear Ratio). A professional scan can confirm if any codes are present.

When to See a Shop: If software updates don't resolve the issue, or if the problem worsens, it's crucial to have your MDX inspected by an Acura dealership or a reputable independent transmission specialist. They can perform a thorough diagnosis, which might include inspecting internal components or, in some cases, considering transmission replacement or repair if a mechanical fault is identified. Ignoring severe transmission issues can lead to more extensive and costly damage.

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