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.
Cost for a transmission flush. One of the only maintenance items you can perform on a transmission is a flush, which replaces old transmission fluid with new fluid. Signs your car many need a transmission flush include problems shifting gears and gears that are slipping.