How to Check the Condition of Transmission Fluid?
2 Answers
To check the transmission fluid, follow these steps: 1. For more accurate results, shift into P (Park), start the vehicle, and let it idle for 2 minutes. 2. Press the brake pedal and shift gears in the following sequence: R-N twice, then N-D twice, keeping the brake pedal pressed throughout. Finally, shift into N (Neutral). 3. Press the brake pedal, shift into R (Reverse), release the pedal, and let the wheels rotate for about 10 seconds. Lightly press the brake pedal to stop the wheels, then shift into N (Neutral) and repeat the operation once more. 4. Press the brake pedal, shift into D (Drive), release the pedal, let the wheels rotate for about 10 seconds, then lightly press the pedal to stop the wheels. Shift into N (Neutral) and repeat the operation once more. 5. After completing the above steps, shift into P (Park), keep the engine idling, lift the vehicle to a suitable position, remove the transmission fluid inspection bolt, and discard the gasket. If the fluid flows in a continuous stream from the inspection bolt hole, the fluid is normal. Additionally, if the fluid appears black, it should be replaced. 6. If the fluid level is low, add fluid through the filler hole until a continuous stream flows out. Replace the gasket with a new one, tighten the filler bolt, check for leaks, lower the vehicle, and the fluid inspection is complete.
I always follow the transmission fluid inspection procedure meticulously, as even a small mistake could damage the car: First, let the engine run for about ten minutes to reach operating temperature, park on level ground, engage the handbrake, and turn off the engine. Then, open the hood, locate the transmission dipstick, pull it out, wipe it clean, reinsert it for a few seconds, and pull it out again to check the oil traces. The fluid level should be between the high and low marks; bright red and clear fluid is ideal, while blackened or burnt-smelling oil indicates aging and the need for replacement. I also check for bubbles or metal particles in the fluid, as these hidden issues should be detected early to avoid costly transmission repairs. Generally, it's recommended to inspect the transmission fluid every six months or 10,000 kilometers—developing this habit can save both trouble and money.
