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2018 ILX A-Spec Transmission Jerking and Delayed Shifts

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Chris P. · rep 0 · May 26, 3:29 AM · 1 replies · solved · Question

Vehicle: 2018 Acura ILX A-Spec

Hey everyone, I'm having some worrying issues with my 2018 Acura ILX A-Spec. Lately, the transmission has been acting really strange. I've noticed a significant jerking sensation, especially when downshifting from higher speeds or accelerating from a stop.

It also feels like there's a delay when shifting gears, almost like the car is struggling to find the right gear. Sometimes, it feels like it's slipping a bit before finally engaging. I've heard some clunking noises too, which is definitely not normal.

Has anyone else experienced this with their ILX? I'm worried it might be a serious transmission problem. Any advice or similar experiences would be greatly appreciated before I take it to the dealership.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:29 AM

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ClearTheCode admin answer:

Transmission jerking and delayed shifts in your 2018 Acura ILX A-Spec can be concerning. Here's a breakdown of common causes and steps you can take:

  1. Check Transmission Fluid Levels and Condition: Low or dirty transmission fluid is a frequent culprit. Ensure the fluid is at the correct level and doesn't appear dark or smell burnt. Consult your owner's manual for the correct checking procedure for your specific ILX model.
  2. Software Updates: Acura occasionally releases software updates for the powertrain control module (PCM) or transmission control module (TCM) to address shifting anomalies. A dealership can check if your vehicle is due for any such updates.
  3. Sensor Malfunctions: Sensors like the transmission range sensor, vehicle speed sensor, or input/output shaft speed sensors can send incorrect data to the TCM, leading to erratic shifting. These often trigger diagnostic trouble codes (DTCs).
  4. Solenoid Issues: Transmission solenoids control fluid flow for gear engagement. If they become faulty or clogged, shifting can be affected. Common OBD-II codes associated with transmission issues include P0700 (Transmission Control System Malfunction) and P0730 (Incorrect Gear Ratio).
  5. Internal Transmission Wear: In more severe cases, internal components like clutch packs, valve body, or torque converter could be failing. This usually presents with more consistent and severe symptoms.

When to See a Shop:

  • Immediately if you notice persistent jerking, slipping, or hear grinding/clunking noises.
  • If the 'Check Engine' light or 'Transmission' warning light illuminates on your dashboard.
  • If checking the fluid doesn't resolve the issue, or if the fluid appears burnt.

A professional diagnostic scan at an Acura dealership or trusted independent shop is highly recommended. They can read specific transmission codes, perform a thorough inspection, and accurately pinpoint the root cause before potential damage worsens.

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