What does your driver side door jamb say? I need the "Axle Code" on the the tag to know. I also need to know if it's 4x4 or 2wd. I need this info, because depending on make/model/type, you can have from 3.27 to 4.375. The code should say CA## (example: CA41 means you have the C200 rear axle, with 4.111:1 diff gears).