Now lets talk about the type of flush machine I like. This kind prevents transmission failure or having to locate a used transmission prematurely. It attaches to the pump intake after the pan and filter is removed. This machine only supplies fresh new fluid to the pump intake and as the fluid passes through the transmission it dumps out to a collection tray and never goes back through for a second pass. All of the old fluid and crud is GONE and replace with fresh new fluid. After the service a new filter is installed, the pan replaced and then it is topped off with new fluid to the proper level on the dipstick.
This process takes a total of 20 quarts of fluid to flush out 15 quarts of old fluid, replaces the fluid, and gives the mechanic the opportunity to look in the pan for anything unusual that would indicate a pending failure.
Everyone should have this type of service done every 30,000 miles, but definitely before your truck goes out of warranty. By looking in the pan you may get an indication that you are about to have transmission trouble that might show up right after you get out of warranty.
I will tell you that this type a flush does take more effort and makes more of a mess, costs a little more, but I think it is worth it.
When you weigh the cost of a transmission maintenance performed properly and the cost of a premature transmission failure, which may cause the need for a rebuilt transmission or replacement transmission, it is obvious that performing proper maintenance saves big bucks. Trust me.
