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2017 XC90 T6 rough shifting and hesitation in lower gears

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Mark S. · rep 0 · May 22, 5:12 AM · 1 replies · solved · Question

Vehicle: 2017 Volvo XC90 T6 Momentum

Hey everyone,

I'm experiencing some concerning issues with my 2017 Volvo XC90 T6 Momentum. Lately, the transmission has been acting up, especially in lower gears. I'm noticing a significant hesitation when accelerating from a stop, and then it often shifts quite roughly into second or third gear.

It feels like the car is struggling to find the right gear, and sometimes there's a noticeable jolt. There's no check engine light on yet, but it's definitely not driving as smoothly as it used to. I'm worried this could be a major transmission problem.

Has anyone else with a similar year XC90 experienced anything like this? What could be causing it, and what should I be looking into?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:12 AM

0

ClearTheCode admin answer:

Rough shifting and hesitation in your 2017 Volvo XC90 T6 can stem from several issues, often related to the transmission or its control systems. Even without a Check Engine Light (CEL), early signs like yours warrant investigation.

Common Causes:

  1. Low or Contaminated Transmission Fluid: Over time, transmission fluid can degrade or levels can drop, leading to poor lubrication and shifting performance.
  2. Software Glitches: Volvo's sophisticated transmissions rely heavily on software. Outdated or corrupted software can cause erratic shifting patterns.
  3. Valve Body Issues: The valve body controls the flow of transmission fluid to engage gears. Malfunctions here can lead to delayed or harsh shifts.
  4. Transmission Solenoids: These electronic components regulate fluid pressure. Faulty solenoids can cause incorrect gear engagement.
  5. Torque Converter Problems: Less common, but a failing torque converter can cause shuddering or hesitation, especially at lower speeds.

When to See a Shop:

It's highly recommended to have your vehicle inspected by a qualified Volvo technician as soon as possible. Ignoring these symptoms can lead to more severe and costly transmission damage. A shop will perform the following:

  1. Diagnostic Scan: Even without a CEL, a professional scan tool can often reveal pending codes or specific transmission module fault codes (e.g., P0700 - Transmission Control System Malfunction) that indicate underlying issues.
  2. Fluid Level and Condition Check: They will inspect the transmission fluid for proper level, color, and smell.
  3. Software Update: Check for and apply any available transmission control module (TCM) software updates.
  4. Road Test: A technician will drive the vehicle to replicate the symptoms and confirm the diagnosis.

Early diagnosis can often prevent minor issues from escalating into major transmission overhauls.

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