5.9 engine quad cab 120000 miles after transmission is warm if I use kick down to pass someone won't upshift unless you stop for a few minutes engine running and start from a stop. Also after cruising highway speeds 55 to 70 mph for 30 minutes or more and take an exit stop at end of ramp won't upshift properly again. Replaced all sensors and governor filter and fluid. Did not help what else can be wrong?