2000 Dodge Ram Overdrive Problem

I have a 2000 Dodge Ram 4x4. It only has 58000kms!! A couple of months ago while on the highway, my O/D OFF light comes on. I wasn't towing anything!! This also happen again a couple of days ago while on the highway for only 30 mins. I was wondering if anyone had any suggestions!! Also in the morning or whenever I turn on the truck for the first time for the day, when I put the truck in drive and give it the gas, the truck seems like she wants to stall or very hesitant to go. I have to give her more gas and then she is OK. This has been a problem for awhile. I also had the computer flash!! Problem still remains!!

Thanks

Johnny

well the hesitation could be a problem with the fuel pump. as for od light i duno