Blood Moon's Sacrament

So i have a little auto 1994 chevy s10 thats having issues. It has park, neutral, and reverse. But not any forward gears. When shes in reverse, you can fly. But when you try using overdrive, drive, 1 and 2, it either barely moves around 1500rpm or it doesn't move at all. It hasnt been burning oil or fluids and they dont have any off smells, it doesnt squeal, bang or make weird noises, theres no service lights popping up and its stumping me. Truck has around 188k km on it and was never "bagged" as far as i know. Any help would be greatly appreciated.