Transmission Fluid Change: Gravity Method or Flushing Machine?

[DiMariana]

From an economic perspective, the gravity method is more cost-effective for transmission fluid changes. Gravity changes typically cost between 400 to 500 yuan, while flushing machine changes start at around 1500 yuan. The differences between the two methods are: 1. Operation: The gravity method is relatively simpler. Most automatic transmissions have a fluid level port that can be used to drain, check, or change the fluid. Although the steps are straightforward, the fluid in an automatic transmission cannot be completely drained by gravity alone—colloquially speaking, "it doesn't get all out." The flushing machine method consumes much more fluid per change and involves a more complex process. 2. Effectiveness: The gravity method only replaces 50% to 60% of the old fluid, as the remaining fluid in the torque converter and oil cooler cannot be removed. The flushing machine method allows for a more thorough fluid replacement.