ok I post this the other day but now cant find the thread. my 95 bronco with only 20k miles (yes i did 2 car fax) and they are original. the o/d light flashes and feels like the rear end does not kick into gear. i went to ford and thay say there is an electrical short. i had speed sensor changed and problem is on going. the whole problem is that some days it happens other days it doesn't does any one know any suggustions on how to fix????