we drove down from Wisconsin to take care of my mother in laws estate and on the way down our truck made a clunking noise a couple of times most likely from the heat I called and set up an appointment for service and after looking into it they found that all it was dirty fluid and a dirty screen so they replaced the fluid and cleaned the screen and it runs smooth as new they did not try to sell me on unnecessary parts just took care of my problem I we would not hesitate to take our vehicle back 100% satified