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Rough Shifting/Jerking from 8-Speed DCT in 2018 ILX A-Spec

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Mike T. · rep 0 · May 26, 3:29 AM · 1 replies · solved · Question

Vehicle: 2018 Acura ILX A-Spec

Hey everyone,

I've been experiencing some really rough shifting and jerking, especially at lower speeds and during gear changes in my 2018 Acura ILX A-Spec. It feels most noticeable when I'm accelerating slowly or decelerating to a stop, almost like the car can't decide which gear to be in.

Sometimes, it feels like a slight lurch forward even when I'm just cruising. I'm worried this might be a transmission issue. Has anyone else with a 2018 ILX or similar model experienced this? What should I be looking for?

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

Rough shifting or jerking in your 2018 Acura ILX A-Spec's 8-speed Dual-Clutch Transmission (DCT) can be concerning. Here's a breakdown of potential causes and steps you can take:

  1. DCT Characteristics: It's important to note that DCTs can sometimes exhibit different shift characteristics compared to traditional automatic transmissions, especially at low speeds. However, excessive jerking is not normal.

  2. Transmission Fluid:

    • Cause: Low or degraded transmission fluid can lead to poor shifting performance. The 8-speed DCT uses a specific fluid (Acura DW-1 or equivalent).
    • Action: Check your transmission fluid level and condition. If it's dark, smells burnt, or is low, a fluid change might be necessary. This is often a maintenance item.

  3. Software Updates:

    • Cause: Acura often releases software updates for transmission control modules (TCM) to refine shift logic and address known issues.
    • Action: Contact your Acura dealership to inquire if there are any pending software updates for your 2018 ILX's transmission.

  4. Clutch Pack Wear:

    • Cause: Over time, the clutch packs within the DCT can wear, leading to slipping or harsh engagement.
    • Action: This is a more serious issue requiring professional diagnosis.

  5. Sensor Issues:

    • Cause: Faulty speed sensors or other transmission-related sensors can send incorrect data to the TCM, causing erratic shifts.

When to See a Shop: If a fluid check and potential software update don't resolve the issue, or if the jerking is severe, accompanied by warning lights (like the 'D' light flashing), or unusual noises, it's crucial to have your ILX inspected by an Acura-certified technician immediately. They have specialized diagnostic tools to pinpoint internal transmission problems or sensor failures.

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