I pulled a full width 9" out of an F-100 to replace the EB 9" I have now. Well I started tearing it down and and found that it also had, necked down, 28 spline. I was wonderiong if I could still go big bearing 35 spline with this axle? This axle tube has a lot bigger diamiter than the EB axle tube, where the bearing sets. It also has the same shaft diamiter as a 31 spline at the bearing, then it necks down twice to 28 spline.
Do we have any 9" experts out there???