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.
Location: Carmel, Indiana. Cost of a transmission flush: $205. Other cost factors: Cost for special fluid, such as synthetic, can add another $25 to $50. Final thought: âWe refer to the manufacturerâs recommendation for when it should be done, if at all,â Waeiss says.