I am still running the factory steering box and have had no issues thus far (fingers crossed). I have not used Red Head steering gears but have heard good things about them. I have set up a number of vehicles with hydro assist steering when running large tires and it does work well. One main function is to remove the stress from the sector shaft of the steering gear and the associated bearings. If I were you I would be looking into why the steering gears you have used are wearing out so quickly, they should be lasting far longer obviously...
