How to Check Transmission Fluid?
2 Answers
To check transmission fluid, you need to let the engine idle and warm up the fluid to around 50 degrees Celsius. Then move the gear lever through each position, pausing for 2 seconds in each gear before shifting to park. You can then check the fluid level by observing the marks on the transmission dipstick. The normal fluid level should be between the maximum and minimum marks on the dipstick. If the automatic transmission is cold, the fluid level should be near the lower mark on the dipstick. If the automatic transmission is hot, the fluid level should be near the upper mark on the dipstick. This is because hydraulic fluid has higher viscosity at low temperatures, and more fluid adheres to components like planetary gears during operation, resulting in a lower fluid level.
Checking transmission fluid is actually quite simple. I make it a habit to take a look every time my car undergoes maintenance. First, start the engine and let it run for a few minutes to warm up the fluid for better flow, but be careful not to touch hot components to avoid burns. Then locate the transmission dipstick in the engine bay, usually marked with a bright color. Gently pull it out, wipe off the fluid with a clean cloth, fully reinsert it, and then pull it out again for a thorough inspection. The fluid level should be between the high and low marks—overfilling can cause leaks, while insufficient levels may damage the transmission. Pay attention to the color as well: fresh fluid is a clear red or light brown. If it appears dark, murky, or has a burnt smell, it may indicate wear or overheating, signaling an immediate need for replacement. Personally, I check every three months or before long trips—catching issues early can save a lot on repair costs.
