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2019 NSX Transmission Shifting Rough and Delayed

0

Mike T. · rep 0 · May 26, 3:59 AM · 1 replies · solved · Question

Vehicle: 2019 Acura NSX

My 2019 Acura NSX has developed a noticeable problem with its 9-speed dual-clutch transmission (DCT). Lately, shifts have become very rough, almost jerky, especially at lower speeds and when downshifting. There's also a significant delay when engaging drive or reverse.

It's making the driving experience much less enjoyable. I've heard some NSX owners mention transmission quirks, but this feels different. Is this a common issue for the 2016-2026 models? What should I be looking into?

I'm hoping it's not a major transmission overhaul, but the symptoms are worrying.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:59 AM

0

ClearTheCode admin answer:

Rough shifting and delayed engagement in your 2019 Acura NSX's 9-speed DCT are definitely symptoms that warrant investigation. While the NSX's DCT is a high-performance unit, these issues are not typical and suggest a problem.

Here's a breakdown of potential steps and causes:

  1. Check Transmission Fluid Level and Condition: The first step is to ensure the transmission fluid (ATF) is at the correct level and isn't contaminated or burnt. Low or degraded fluid can cause significant shifting problems.
  2. OBD-II Scan for Codes: A diagnostic scan can reveal specific transmission-related fault codes. Look for codes such as:
    • P0700: Transmission Control System Malfunction Indicator Request (a general code indicating a transmission issue).
    • P0720: Output Speed Sensor Circuit Malfunction (can affect shift timing).
    • Codes related to clutch pack wear, solenoid issues, or pressure control.
  3. Software Update: Sometimes, rough shifting can be resolved with a software update for the Transmission Control Module (TCM). Acura periodically releases updates to refine shifting logic and performance.
  4. Potential Causes: Beyond fluid and software, the issue could stem from:
    • Clutch Pack Wear: The DCT's clutches can wear over time, leading to slipping or harsh engagement.
    • Solenoid Malfunction: Solenoids control fluid flow within the transmission, and if one fails, it can disrupt shifting.
    • Mechatronic Unit Issues: This integrated unit controls the transmission's hydraulic and electronic functions.
  5. When to See a Shop: It's crucial to have your 2019 NSX inspected by an Acura dealership or a reputable transmission specialist. Driving with a malfunctioning DCT can lead to further damage. Early diagnosis can potentially save you from more extensive repairs down the line.
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