The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2017 Outback CVT Shuddering and Hesitation from a Stop

0

Mike T. · rep 0 · May 25, 2:14 AM · 1 replies · solved · Question

Vehicle: 2017 Subaru Outback 2.5i Limited

Hey everyone, I'm experiencing some concerning issues with my 2017 Subaru Outback 2.5i Limited. Lately, it's developed a noticeable shudder, especially when accelerating from a stop or at lower speeds. It almost feels like the transmission is slipping or struggling to engage properly. Sometimes there's also a hesitation before it really gets going.

I've heard about CVT issues with Subarus, and I'm worried this might be it. The car has about 85,000 miles on it and I've kept up with regular oil changes, but haven't touched the transmission fluid. Has anyone else dealt with this? No check engine light yet, but it's definitely not driving right.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:14 AM

0

This sounds like a classic symptom of a Continuously Variable Transmission (CVT) issue, which can manifest as shuddering, hesitation, or even a complete loss of power. While a Check Engine Light (CEL) might not be on yet, a pending code, often P0700 (Transmission Control System Malfunction), could be stored.

Here's what could be happening:

  1. Degraded CVT Fluid: Over time and mileage, CVT fluid loses its lubrication properties, leading to increased friction and wear within the transmission, causing the shudder. Subaru specifies a particular type of CVT fluid that must be used.
  2. Valve Body Malfunction: The valve body controls fluid pressure and flow within the CVT. A faulty valve body can lead to improper engagement and shifting.
  3. Torque Converter Issues: The torque converter can fail, causing shuddering during acceleration, especially at specific RPMs.
  4. Internal CVT Component Wear: General wear and tear on the internal belts or pulleys can also lead to these symptoms.

What to do:

  • Check CVT Fluid: While many CVTs are "sealed," the fluid level and condition should be checked by a qualified technician. This often requires specialized tools.
  • Scan for Codes: Even without a CEL, a professional scan tool can often pull pending or historical transmission codes (like P0700) that can help diagnose the problem.
  • Professional Diagnosis: It's crucial to have a Subaru-specific mechanic or dealership diagnose this immediately. Ignoring these symptoms can lead to catastrophic transmission failure.

When to see a shop: You should schedule an appointment immediately. Continuing to drive with these symptoms can cause further, more extensive, and costly damage to the transmission. A proper diagnosis will involve checking fluid, scanning for codes, and potentially performing specific diagnostic tests on the CVT system.

Menu

Help & account