So I'm driving out of town the other day for a study, van runs fine no issues. But I noticed it took forever to get into Overdrive, I had to speed up to 70mph maybe a tad bit more and cruise at that speed for a few till it kicks into Overdrive and then I go back down to 65mph and set the cruise control. The next day driving back home, it didn't wanna kick into Overdrive at all. I drove home doing 60mph since it didn't seem to keep the RPMs' to high and still able to maintain normal highway speeds. But wtf could be the issue? Could it be that the trans cable needs to be adjusted or is the OD switch not working? HELP??? It's already bad on gas mileage in my mind, and I do alot of highway driving