Cars and Car Technology
Cars and Car Technology for You and Families. What we need to know.
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Reply To: Transmission Fluid Flush? Drain and Fill instead
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A transmission fluid flush completely removes old fluid and cleans out contaminants, while a drain and fill only replaces about 30-50% of the fluid.
For well-maintained vehicles, a drain and fill is often sufficient, but
a flush may be necessary for high-mileage or poorly maintained
transmissions.