The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2020 RDX Advance: Intermittent Transmission Hesitation/Shudder

0

Brian F. · rep 0 · May 22, 4:54 AM · 1 replies · solved · Question

Vehicle: 2020 Acura RDX Advance

Hello Acura community,

I'm experiencing a strange issue with my 2020 Acura RDX Advance. Occasionally, when accelerating from a stop or at low speeds (around 15-30 mph), the transmission seems to hesitate or shudder slightly before engaging smoothly. It's not a hard jolt, more like a brief, inconsistent slip or vibration.

There's no Check Engine Light on, and I haven't pulled any codes with my basic OBD-II scanner. It's very intermittent, making it hard to reproduce consistently for a mechanic. It feels like it's getting a little more frequent lately, especially when the car is warm.

Has anyone with a 2020 RDX experienced anything similar? Could this be a software issue, or something more serious with the 10-speed transmission? Any insights would be helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:54 AM

0

ClearTheCode admin answer:

Intermittent transmission hesitation or shudder in a 2020 Acura RDX, even without a Check Engine Light, is a concern that warrants attention. While the 10-speed automatic transmission is generally robust, these symptoms can indicate several potential issues.

Common Causes:

  • Transmission Fluid Condition: Low or degraded transmission fluid can lead to poor shifting performance. Even if the fluid level appears correct, its quality can degrade over time.
  • Torque Converter Issues: The torque converter can sometimes cause shuddering, especially at specific speeds or during lock-up, if there's internal wear or fluid flow problems.
  • Software Glitches/Updates: Modern transmissions are heavily controlled by software. Outdated or corrupted transmission control module (TCM) software can lead to erratic shifting behavior.
  • Solenoid Malfunctions: Internal transmission solenoids control fluid flow and gear engagement. A sticking or failing solenoid can cause hesitation.
  • Internal Wear: While less common on newer vehicles, internal clutch pack or valve body wear could manifest as intermittent shuddering.

Troubleshooting Steps:

  1. Check Transmission Fluid: While there might not be a dipstick, ensure the fluid level is correct and note its color and smell. Burnt smell or dark color indicates degradation.
  2. Note Conditions: Pay close attention to when the shudder occurs: specific gears, engine temperature, acceleration intensity, etc. This information is vital for diagnosis.
  3. Scan for Pending Codes: Even without a CEL, a more advanced scanner might reveal pending or historical transmission-related diagnostic trouble codes (DTCs) that a basic scanner might miss.

When to See a Shop:

Given the complexity of modern transmissions, it's highly recommended to take your 2020 RDX to an Acura dealership or a reputable transmission specialist as soon as possible. They can perform:

  • Advanced Diagnostic Scan: Use a Honda/Acura specific diagnostic tool (HDS) to check for all stored transmission codes, sensor readings, and software versions.
  • Transmission Software Update: Check if there are any available software updates or technical service bulletins (TSBs) related to transmission shifting for your model year.
  • Fluid Inspection and Replacement: If fluid quality is suspect, a transmission fluid flush and replacement with genuine Acura DW-1 fluid might be recommended.
  • Road Test with Data Logging: A technician can drive the vehicle while monitoring live transmission data to pinpoint the exact conditions causing the shudder.

Early diagnosis can prevent minor issues from escalating into major transmission repairs.

Menu

Help & account