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2016 QX60 AWD Transmission Hesitation/Shudder

0

Mike T. · rep 0 · May 25, 3:46 AM · 1 replies · solved · Question

Vehicle: 2016 Infiniti QX60 AWD

Hi everyone,

My 2016 Infiniti QX60 AWD, with about 85,000 miles, has started acting up with its transmission. When I accelerate from a stop or at low speeds, there's a noticeable hesitation, almost like it's struggling to find the right gear, followed by a slight shudder. It's not constant, but it's happening more frequently now.

I've heard about some CVT issues with these models, and I'm a bit concerned. There's no check engine light on yet, but the feeling is definitely not normal. Has anyone experienced this with their QX60? What was the cause, and what kind of repairs should I expect?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:46 AM

0

ClearTheCode admin answer:

Your description of hesitation and shuddering during acceleration in a 2016 Infiniti QX60 is a common concern associated with Continuously Variable Transmissions (CVTs) in certain Nissan and Infiniti models of that era. While no specific OBD-II code is present yet, these symptoms often point to internal CVT issues.

Potential Causes for CVT Hesitation/Shudder:

  1. Degraded CVT Fluid: The most common cause. Over time, CVT fluid breaks down and loses its lubricating properties, leading to increased friction and wear within the transmission. This can cause the belt and pulley system to slip or shudder.
  2. Worn Belt or Pulleys: Internal wear on the CVT's primary and secondary pulleys or the steel belt can lead to inconsistent power transfer and shuddering. This is often a result of extended use with degraded fluid.
  3. Valve Body Issues: The valve body controls the hydraulic pressure within the CVT. Malfunctions or blockages in the valve body can lead to incorrect fluid pressure, affecting engagement and smooth operation.
  4. Torque Converter Lock-up Clutch: Issues with the torque converter's lock-up clutch can cause shuddering, especially at certain speeds or during engagement.
  5. Software Calibration: Sometimes, the transmission control module (TCM) might need a software update or recalibration to optimize CVT operation, though this is less likely to cause a distinct shudder.

When to See a Shop:

  1. Immediate Inspection: It's crucial to have your QX60 inspected by a qualified technician specializing in transmissions or Infiniti vehicles as soon as possible. Ignoring these symptoms can lead to more severe and costly transmission damage.
  2. Fluid Check: The first step a technician will likely take is to check the CVT fluid level and condition. If the fluid is dark, burnt-smelling, or low, a fluid and filter change might be recommended, though this is often a temporary fix if internal wear is already present.
  3. Diagnostic Scans: Even without a check engine light, a professional scan tool can read pending codes, historical codes, and monitor real-time CVT parameters to identify any anomalies.
  4. Professional Diagnosis: Due to the complexity of CVTs, a proper diagnosis requires specialized knowledge. The technician will assess whether the issue is resolvable with a fluid service, valve body replacement, or if a full transmission overhaul or replacement is necessary.
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