Do you have to flush transmission oil?

Flushing transmission oil is not always necessary and can depend on the vehicle and its maintenance history. Some manufacturers recommend flushing as part of routine maintenance, while others suggest simply draining and replacing the fluid. Flushing can help remove debris and contaminants, but it may also dislodge sludge that could cause issues in older transmissions. It's best to consult your vehicle's manual or a professional mechanic for specific guidance.