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.
The general recommendation is to flush your transmission every 2 years or 30,000 miles. In most cases, getting a transmission flush every 30,000 miles, or every two years or so is sufficient. However, there may be times when you need to get a transmission flush sooner, in order to help protect your car's transmission. There are some common signs that you need to perform a transmission flush on your car or truck. Transmission Grinding or Strange Noises. A vehicle transmission that is contaminated with dirt, grease and sludge can display symptoms very similar to inadequate levels of transmission fluid.