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Rough Shifting on 2016 RLX P-AWS - Jerky at Low Speeds

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Mike T. · rep 0 · May 26, 3:57 AM · 1 replies · solved · Question

Vehicle: 2016 Acura RLX P-AWS

Hi everyone,

I'm experiencing some really rough and jerky shifting with my 2016 Acura RLX P-AWS, especially at lower speeds and when downshifting. It's most noticeable when coming to a stop or accelerating gently from a standstill. It feels like the transmission is confused or hesitating.

The car has about 80,000 miles, and I've had the transmission fluid changed at the recommended intervals. There are no warning lights on the dash, but the driving experience has become quite unpleasant. It's not a smooth, refined shift like it used to be.

Has anyone else with a 2016 or similar P-AWS model experienced this? Could it be a solenoid, or perhaps something more serious? Any insights would be helpful.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:57 AM

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ClearTheCode admin answer:

Rough or jerky shifting in your 2016 Acura RLX P-AWS can be concerning, especially when it affects the overall driving experience. While your transmission fluid changes are a good preventative measure, several factors can contribute to these symptoms.

Common Causes & Diagnostics:

  1. Transmission Fluid Level/Quality: Even with regular changes, an incorrect fluid level (either too low or overfilled) or the use of an incorrect fluid type can cause shifting issues. Always use Acura's genuine DW-1 fluid.
  2. Transmission Solenoids: The transmission relies on various solenoids to control fluid flow and engage gears. A faulty or clogged solenoid can lead to hesitant or harsh shifts. This might trigger a generic transmission code like P0700 (Transmission Control System Malfunction) or more specific Acura codes.
  3. Torque Converter Issues: A failing torque converter can cause shuddering, especially during acceleration or at specific speeds.
  4. Transmission Control Module (TCM) Software: Sometimes, a software update for the TCM can resolve shifting anomalies.
  5. Internal Wear: While less common at 80,000 miles with proper maintenance, internal wear of clutches or other components can cause issues.

What to Do:

  1. Check Fluid Level Again: Ensure the transmission fluid level is precisely at the correct mark when the engine is warm, following the procedure in your owner's manual.
  2. Scan for Codes: Even without a check engine light, a pending or historical transmission-related code might be stored. Use an OBD-II scanner to check for codes like P0700 or any manufacturer-specific transmission codes.
  3. Professional Inspection: Given the complexity of modern transmissions, it's best to have a qualified Acura technician inspect the vehicle. They can perform a more in-depth diagnosis, check line pressures, test solenoids, and look for any available software updates. Early diagnosis can prevent more extensive damage. Describe the symptoms precisely (when it happens, what speed, etc.) to help them pinpoint the issue.
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