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2018 Outlander Sport CVT Hesitation and Whining Noise

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Jennifer H. · rep 0 · May 22, 5:29 AM · 1 replies · solved · Question

Vehicle: 2018 Mitsubishi Outlander Sport ES

Hey everyone,

I've got a 2018 Mitsubishi Outlander Sport ES with about 75,000 miles on it, and I'm starting to get worried about the transmission. Lately, when I accelerate from a stop, there's a noticeable hesitation, almost like it's slipping before it catches. It's not smooth at all.

On top of that, I've started hearing a distinct whining noise, especially when I'm driving at highway speeds or under light acceleration. It sounds like it's coming from the transmission area. I've checked the fluid level, and it seems okay, but I'm not sure what else to look for. No check engine light yet, but the performance is definitely off.

Has anyone else experienced this with their Outlander Sport or other Mitsubishi models with the CVT? Any ideas what might be going on or what I should check before taking it to a shop?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:29 AM

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ClearTheCode admin answer:

It sounds like you're describing classic symptoms of a Continuously Variable Transmission (CVT) issue, which can be common in higher mileage vehicles if maintenance isn't strictly followed.

Possible Causes:

  1. Low or Degraded CVT Fluid: Even if the level appears okay, the fluid itself might be old, contaminated, or have lost its lubricating properties. Mitsubishi CVTs are very sensitive to fluid quality.
  2. Clogged CVT Filter: Many CVTs have an internal filter that can become clogged with metallic debris over time, restricting fluid flow and causing pressure issues.
  3. Worn Belt/Pulleys: The internal components (belt and pulleys) can wear down, leading to slipping and the whining noise you're hearing.
  4. Valve Body or Solenoid Issues: Problems with the valve body or individual solenoids can prevent proper fluid pressure regulation, leading to hesitation.

When to See a Shop: Given the symptoms, it's highly recommended to have your vehicle inspected by a qualified mechanic specializing in transmissions or a Mitsubishi dealership as soon as possible. Continuing to drive with these issues can lead to more severe and costly damage.

What a Shop Will Do:

  1. Diagnostic Scan: Even without a check engine light, a professional scan tool can often pull pending or historical transmission-specific codes.
  2. CVT Fluid Inspection & Replacement: They will check the fluid condition, not just the level, and recommend a fluid and filter change using genuine Mitsubishi CVT fluid.
  3. Road Test & Physical Inspection: A technician will drive the vehicle to confirm symptoms and listen for the source of the noise.
  4. Pressure Tests: Specialized equipment can test the internal pressures of the CVT to pinpoint issues with the pump, valve body, or internal components.

Ignoring these symptoms can lead to complete CVT failure, which is a very expensive repair, often requiring a full transmission replacement. Address it proactively!

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