You should check your transmission fluid regularly as part of routine vehicle maintenance. Here are key points on when and how to check it:
- It is best to check the automatic transmission fluid with the engine running and at its normal operating temperature (warm). This ensures an accurate reading because the fluid expands when warm. The vehicle should be on a level surface and in Park or Neutral with the parking brake engaged.
- Some vehicles have markings on the dipstick for both cold and hot fluid levels; generally, when the engine is warm, the fluid should be close to the "hot" line.
- If your vehicle lacks a transmission fluid dipstick, it often requires professional service to check the fluid.
- As a routine, it's recommended to check the transmission fluid level at least every oil change or every six months, but some sources suggest even monthly checks, especially if you drive frequently or under severe conditions.
- Transmission fluid should be changed according to your vehicle manufacturer’s recommendations, often around every 30,000 to 60,000 miles.
- Watch for warning signs like delayed gear shifts or slipping, which can signal low or deteriorated transmission fluid.
In summary, check your transmission fluid with the engine warm, running, in Park or Neutral, on a level surface, and check it regularly as part of your vehicle maintenance schedule.
