- The fluid is dark brown or black. Fresh transmission fluid is typically red or pink, so if it has turned dark, it's a good sign that it's time for a change.
- The fluid smells burnt. This is a sure sign that the fluid has overheated and needs to be replaced.
- The transmission is slipping. This means that the fluid is not providing enough friction between the gears, causing them to slip out of place.
- The transmission is making strange noises. This could be a whining, grinding, or clunking sound.
- The transmission is shifting hard. This means that the fluid is not flowing smoothly, causing the gears to shift abruptly.
- The car is lurching or jerking. This could be a sign that the transmission is not functioning properly due to a lack of fluid.
- The fluid is foamy. This could indicate that air is getting into the transmission, which can cause the seals to fail.
- You've reached or are approaching the recommended transmission fluid change interval (typically every 30,000-60,000 miles).
