I need help! My transmission went out and took my rear diff with it (or maybe it was the other way around?) It happened 4 years ago and due to budget issues we didn't fix her right away. We got a rear diff at our local PickNPull and had the transmission rebuilt but the diff we got at PNP has a different ratio and I'm not sure how to figure out the correct rear diff number. She's a long bed extra cab with the special tow package and a 5.7L V8. I'm the second owner. Is there a number hidden in the VIN?