For Savory substitute thyme (stroner flavor) or thyme with a little sage or mint.
1 Flushing a transmission with a pressurized machine can cost $125-$300 or more, and may include pushing a special cleaning compound through the system. 2  The power flush process typically replaces all of the transmission fluid, and can require 12-22 or more quarts.
Douglas says the average cost of a flush is $100. Sean Avner, owner of A Team Transmissions in Columbus, Ohio, recommends a flush every 20,000 to 60,000 miles, while Avner recommends the service every 100,000 miles, adding that flushes are less important in newer vehicles.