Originally Posted by MedicMan95
I saw in your description thing below your comment that you have an eaton, I looked it up and is says they dont make it for an 06 ford. Did you change youre rear axle?
They do make it for your truck. Search Ford 8.8 axle, 28-spline and you will find it. The 8.8 axle is a very common axle and eaton makes the truetrac L/S for the 28 and 31 spline.
Edit: Here is the part number: 912A562