How Often Should the Transmission Fluid in a Focus Be Changed?

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The initial replacement of automatic transmission fluid for the Focus should occur at 55,000 kilometers, followed by subsequent changes every 60,000 kilometers. Below are the methods for changing the transmission fluid: 1. Gravity Drain Method. As the name suggests, the gravity drain method involves loosening the drain plug (or removing the oil pan) to allow the automatic transmission fluid to flow out under its own weight, then replenishing with new transmission fluid through the filler port. The drawback of this method is that it cannot completely drain all the fluid, with a replacement ratio potentially reaching only 50%, so the effect after adding new transmission fluid may not be very noticeable. However, the advantage of the gravity method is its lower cost, generally about half that of the machine exchange method. 2. Machine Exchange Method. The machine exchange method uses specialized equipment to generate pressure, dynamically replacing the fluid in the transmission's lubrication and cooling lines. This process takes longer. But its advantage is a more thorough fluid replacement, capable of removing over 95% of the old fluid, and it can also clean out sludge and metal shavings inside the automatic transmission.