My rear axle broke and I tried to repair it however, it became so hot that it is stuck and I cant remove it. It is loose but it will not pull out. I have decided that I want to replace the entire rear end and I have found one from a guy who is parting out a 92 f250. Questions: 1. How can I tell what the gear ratio is? 2. I have a 3.55 in my truck and would like to keep the same. If the new one is 3.73 or 4.10 can I swap gears from the one I have? This is a pic of the tag on inside of door of the truck that is being parted out, that im about to buy the entire rear end off of. Thanks!