hopper
Senior Member
Started driving my 03 250 240,000 trans fluid looking a little dirty but full. I have been told to not change it or the new oil could cause my tansmition to slip. Watched some videos and I get why this could happen. So any suggestions drive it till it breaks, drain it snd refill (not flush) just would like to maintaine this old truck. I hate when I try to prevent somthing and end up breaking up.