TRANSMISSION WANT SHIFT INTO OVERDRIVE
I have a 97 Dakota, I can drive it (stop and go) for about 10-15 miles and it shifts fine. Then it will start down shifting very hard out of overdrive. It will down shift sometimes at 60mph when i let off the gas. Sometimes it will shift back into overdrive at 45mph but most of the time when it downshifts hard it will not shift back.All the other gears shift fine, just the high gear.You can run the rpm up to what every you want to and let off the gas and it will not shift no matter what. I have changed the fluid and filterand it does the same thing. I have rebuilt engines but never worked on transmissions. Please someone give me any ideas to fix this problem. I dont have the money to take it to a shop.