pops out of drive into lower gear and cant get it to go back

What is your question?

I can shift just fine thru all gears and then suddenly it will slip and wind out into neutral and then downshifts into second . Wont go back into drive forcing to drive in lower gear and sucks up all my gas other wise it drives nicely I have aligned front end and struts also changed high speed sensor was told it might me another sensor or possible linkage . also speedometer and gas gage work intermittently . I am getting very poor mileage due to driving in lower gear