I'm not certain, but I may know where I can find a used replacement for you. There is a scrap yard near me that has several of these old trucks but I don't know if any of them have two speed axles. These things have been sitting for years,and are full of weeds, rust, bees, probably snakes,and lord knows what else, so I'm not too eager to get into them, but if all else fails, let me know,and I will look into it. Allen