[swervin ervin]

If you will look on the passenger side axle tube, about 3 - 6 inches out from the center section on the front side, there will be a 3 letter/number code, hand die punched into the tube. You will need to clean it real good because they are extremely hard to find being as they are only around 1/8" tall. Find this code and I will tell you what ratio your truck came stock with.