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2018 ILX Transmission Hesitation and Rough Shifts at Low Speeds

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Mike T. · rep 0 · May 26, 3:40 AM · 1 replies · solved · Question

Vehicle: 2018 Acura ILX Base

Hey everyone,

I've got a 2018 Acura ILX with about 75,000 miles on it, and I've started noticing some concerning transmission behavior. When I'm driving at lower speeds, especially in stop-and-go traffic or when accelerating from a near stop, the transmission seems to hesitate before engaging the next gear.

Sometimes it feels like a slight lurch or a rough shift, and other times it's more like a momentary slip before it catches. It's not constant, but it's happening more frequently now. The car isn't throwing any check engine lights, and the fluid was checked at the last service and looked okay. Has anyone else experienced this with their 2018 Acura ILX?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:40 AM

0

ClearTheCode admin answer:

Transmission hesitation and rough shifts in your 2018 Acura ILX can be caused by several factors, even without a check engine light. Here's what to consider:

  1. Check Transmission Fluid Condition and Level: While you mentioned it was checked, ensure it's at the correct level when the engine is warm and running (refer to your owner's manual for the exact procedure). Discolored or burnt-smelling fluid indicates a problem. Low fluid can cause pressure issues leading to hesitation.
  2. Software Update: Acura often releases software updates for transmission control modules (TCMs) to address shifting issues. A dealership can check if your 2018 ILX has any pending updates that might resolve this.
  3. Transmission Filter: A clogged transmission filter can restrict fluid flow, leading to inconsistent pressure and poor shifting. This is often replaced during a transmission fluid service.
  4. Clutch Pack Wear: Over time, the internal clutch packs in the transmission can wear down. This can cause slipping or delayed engagement, especially under load. This is a more significant repair.
  5. Torque Converter Issues: A failing torque converter can also manifest as hesitation or shuddering during acceleration.

Diagnostics:

  • While no CEL is present, a professional scan tool might reveal pending or stored transmission-related codes (e.g., P0700 - Transmission Control System Malfunction, or specific gear ratio errors like P0731-P0736) that aren't severe enough to trigger the dash light.

When to see a shop:

  • If the issue is worsening, becoming more frequent, or you notice any new noises (whining, clunking) from the transmission.
  • If you're unsure about checking the fluid yourself or if the fluid appears discolored/burnt.
  • Any time you suspect an internal transmission problem, it's best to have a qualified Acura technician diagnose it promptly. Delaying can lead to more extensive and costly repairs.
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