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Experiencing Rough Shifts and Hesitation with my 2018 QX60 CVT

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Ryan M. · rep 0 · May 22, 5:09 AM · 1 replies · solved · Question

Vehicle: 2018 Infiniti QX60 LUXE

Hi everyone,

I'm reaching out because I'm concerned about the transmission in my 2018 Infiniti QX60. Lately, I've noticed some really rough shifts, especially when accelerating from a stop or at lower speeds. It feels like the car is hesitating or slipping before it finally engages, and sometimes there's a noticeable shudder.

This isn't how it used to drive, and I'm worried about the longevity of the CVT. I've heard some stories about CVT issues in other vehicles, and I want to make sure I'm addressing this proactively. Has anyone else with a 2018 QX60 experienced similar problems? What was the resolution? Should I be looking into a transmission fluid flush or something more serious?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:09 AM

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ClearTheCode admin answer:

Concerns about rough shifts, hesitation, and shuddering in a Continuously Variable Transmission (CVT) are serious and warrant immediate attention. While CVTs operate differently from traditional automatic transmissions, they should still provide smooth, linear acceleration. These symptoms in your 2018 Infiniti QX60 could indicate several underlying issues.

Here's a breakdown of potential causes and actions:

  1. Transmission Fluid Condition: The most basic check is the CVT fluid. Over time, CVT fluid can degrade, losing its lubricating and cooling properties. This can lead to increased friction and poor performance. A fluid flush and replacement with genuine Nissan/Infiniti NS-3 CVT fluid might be recommended, but only after proper diagnosis.
  2. Valve Body Issues: The valve body controls the fluid pressure and flow within the transmission. Malfunctions here can lead to incorrect pressure application, causing rough engagement or slipping.
  3. Torque Converter Problems: A failing torque converter can cause shuddering, especially during acceleration. This is a common component that can wear out.
  4. Belt/Pulley Wear: In a CVT, the belt and pulleys are critical. Excessive wear or damage to these components can lead to slipping, hesitation, and eventually complete transmission failure.
  5. Diagnostic Codes: A professional scan might reveal specific transmission-related diagnostic trouble codes (DTCs), such as:
    • P0741: Torque Converter Clutch Circuit Performance or Stuck Off
    • P0776: Pressure Control Solenoid 'B' Performance or Stuck Off
    • P17F0/P17F1: CVT Judder (specific to Nissan/Infiniti CVTs)

When to See a Shop:

It is crucial to have your QX60 inspected by an Infiniti dealership or a reputable transmission specialist immediately. Continuing to drive with these symptoms can exacerbate the problem and lead to more costly repairs, potentially requiring a full transmission replacement. Do not attempt a fluid change or flush without a professional diagnosis, as it might mask symptoms or worsen an underlying mechanical issue. The dealership can perform a comprehensive diagnostic test, check for relevant TSBs, and advise on the best course of action, which could range from a software update to a transmission replacement.

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