RECENTLY BOUGHT AN ES300 WITH 109000 MILES. THE TRANS OCCASIONALLY HESITATES WHEN DOWN SHIFTING (SUCH AS GOING AROUND A CORNER AND GIVING IT THE GAS). I DON'T KNOW IF THE TRANS HAS BEEN FLUSHED...AS PER REGULAR MAINTENANCE SCHEDULE. I'VE BEEN TOLD THAT THAT'S NOT GOING TO CAUSE THIS PROBLEM. DO YOU THINK IT IS A SENSOR ? OR SOMETHING MORE MAJOR THANK YOU PJL1942