No rack
Welcome to the board, you'll find almost all the info you need to maintain and modifie your Ex here. Try the search tool, it can reveal some past post that could answer many question.
For your question, there is no rack and pinion on Ex, it is a pitman arm system. Check the steering linkage from under the truck, see if they are bend or loose, there is 2 bar that attach to another arm, this arm is connected to a round box. The box is what makes turning possible, also check fluid level, leaks in system. For the whinning it is almost normal for Ford pumps, some do and some dont, but there could be some air in the system making that noise, would have to bleed it, but I dont know how. Make a search on PS pump or power steering pump, some answer should come.