---
id: faq-0069
title: "What does a transmission fluid check involve, and is it necessary?"
category: faq
subtopic: service-and-maintenance
page_type: faq
source_url: "https://www.castlesubarumchenry.com"
tags: ["transmission-fluid", "fluid-check", "transmission-maintenance"]
questions:
  - "Should I check my transmission fluid?"
  - "How often should transmission fluid be serviced?"
  - "What happens if transmission fluid gets dirty?"
related: [fluid-checks, maintenance-schedule, warranty-coverage]
dealer: Castle Subaru McHenry
---

Transmission fluid lubricates and cools your transmission, keeping it running smoothly. Over time, it breaks down and can accumulate debris, which reduces efficiency and can cause shifting problems or gear slipping.

Subaru recommends checking transmission fluid regularly and servicing it per your owner's manual-intervals vary by model and driving conditions. Some Subarus benefit from a transmission fluid change every 60,000-100,000 miles. Neglecting it can lead to expensive repairs.

Castle Subaru McHenry's Service Department will inspect your transmission fluid color and condition, top it off if needed, and recommend service intervals. Call (779) 601-0797 to schedule a transmission fluid check and learn what's best for your Subaru.