I have a 65 Mazda Protege with ovr 170miles. I think I may need a transmission fluid change. But Ive heard it may die faster if I do. Mean while, I am saving for a new vehicle. So should I wait and save or try to change the fluid now. Im trying to get the most mileage out of it before I get my new one because I dont know how long it'll take to save for a new one.