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Transmission Hesitation and Hard Shifts on 2019 S60 T5

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Heather Y. · rep 0 · May 22, 5:12 AM · 1 replies · solved · Question

Vehicle: 2019 Volvo S60 T5 Momentum

Hi all,

I've got a 2019 Volvo S60 T5, and lately, the transmission has been acting really strange. I'm noticing a significant hesitation when accelerating from a stop, almost like it's struggling to find the right gear. Sometimes, it also has really hard shifts, especially between 2nd and 3rd gear, which is quite jarring.

There's no check engine light on, but the driving experience is definitely degraded. It feels like the car isn't as smooth as it used to be. I'm worried about potential long-term damage.

Has anyone with a similar model experienced these transmission issues? Is this a known problem with the 8-speed automatic in these cars? Any advice on what I should check or mention to the dealer?

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

Transmission hesitation and hard shifts on a 2019 Volvo S60 T5, even without a check engine light, can be concerning. The Aisin 8-speed automatic transmission (AWF8F35/45) used in these models is generally robust, but can exhibit issues.

Common Causes:

  1. Low or Contaminated Transmission Fluid: While Volvo often states 'lifetime' fluid, fluid can degrade over time or become low due to a small leak. Incorrect fluid levels or old, contaminated fluid can significantly impact shift quality and cause hesitation.
  2. Software Glitches/Updates: Modern transmissions are heavily controlled by software. Outdated or corrupted transmission control module (TCM) software can lead to erratic shifting behavior. Volvo frequently releases software updates to improve transmission performance and address known issues.
  3. Valve Body Issues: The valve body is a critical component that directs transmission fluid to engage different gears. Wear or sticking valves within the valve body can cause delayed or harsh shifts.
  4. Transmission Solenoids: Solenoids control the flow of fluid within the valve body. If a solenoid is failing or sticking, it can lead to incorrect gear engagement or delayed shifts.

What to Do:

  1. Check Transmission Fluid (if possible): Some Volvo models have sealed transmissions, making a DIY check difficult. If accessible, check the fluid level and condition. Note any burnt smell or dark color.
  2. Schedule a Diagnostic Scan: Even without a check engine light, a professional scan with Volvo's VIDA system can often reveal pending codes or specific transmission fault messages that generic OBD-II scanners might miss. This can point to software issues or internal component problems.
  3. Inquire About Software Updates: Ask the dealership if there are any pending transmission control module (TCM) software updates for your specific VIN. This is a relatively inexpensive potential fix.

When to See a Shop:

Given the nature of transmission problems, it's highly recommended to have your S60 inspected by a Volvo dealership or a specialized transmission shop as soon as possible. Ignoring these symptoms can lead to more severe and costly damage. A professional can accurately diagnose the issue, whether it's a simple software update, a fluid service, or a more involved repair like a valve body replacement.

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