I just bought a 1998 Ram 1500 with the 5.2L motor. I was on the way home and set the cruise at 75 in overdrive. It slowly started losing speed and would hold the cruise speed. I took it off of cruise and I had to stay on it to keep my speed around 75. After that I took it out of over drive and the cruise held and with the cruise off I could hold speed with little pedal pressure. Now of course with overdrive off it sit about 3000 or so rpm’s at highway speeds so I’m getting terrible fuel mileage. Any help on this issue would be really appreciated as the truck is really nice and I don’t wanna feel like I was dealt a lemon in disguise.