These are the gears out of my truck that only has 28k original miles on it. I lifted it and put 37" tires on it and changed the gears on it to 4.56. I can show proof these only have 28k miles on them. These are 3.92 gears ring and pinion and limited slip differential oem. Any questions just ask. I can provide more pics if needed. My truck is a 2008 Dodge Ram big horn 1500 crew cab 1500 4x4 5.7l