http://forums.4x4.com/ 4x4.com community forums Topic: ford 9 inch question en Thu, 08 Jan 2009 20:17:46 +0000 http://forums.4x4.com/topic/ford-9-inch-question#post-78 Fri, 23 May 2008 02:31:20 +0000 gordee 78@http://forums.4x4.com/ <p>i have a ford 9 inch in the rear of my truck i found out the spyder gears are bad my question is this what is the diffrence between a ford 9 inch 28 spline 2 pin and a ford 9 inch 4 pin your help is very much appreciated </p>