I've got a 99 ford expedition with the 5.4 and a 4r100 4wd. It has no speedo the odometer comes on when you turn the car on and if you accelerate in 1rst it acts like it won't shift then once it does the overdrive light starts blinking and the odometer changes to dashes. It also seems to not downshift properly. I put a new sensor in the top of the transmission and also put a new sensor in the rear dif. Neither seem to have helped. Where else should I go? Any wiring diagrams out there?