I have ano 02 1500 with 78k miles and this is the second time the truck has had a mishap when I'm driving it. The trans will feel like it just goes out when I'm driving and when I hit the gas I hear a humming but no accelerating. And when I come to a stop then go to hit the gas, it will either not catch the gear or slowly move and then go for a second then slip again. But if I turn truck off and back on, then it will drive fine. Trans fluid is good. Had it looked over the first time but mechanic could not replicate the problem so nothing was done. I went another 1000 miles after the first time and tonight it did it again. It will also shift hard on the first shift from a stop(sometimes). Any ideas would be great!