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.
To this end, the cost of a transmission flush may range from $75 to $380. However, most drivers pay and average of between $150 and $200. However, this applies for vehicles not considered as luxury vehicles and services offered by standard repair mechanics.