Yukon Dura Grip Ford 10.25/10.5 Rear 35 Spline 99-16 Ford F-250/350 Superduty. Fits: 1983 - 1987 Ford 6.9L IDI; 1988 - 1994 Ford 7.3L IDI; 1994 - 1997 Ford 7.3L Powerstroke; 1999 - 2003 Ford 7.3L Powerstroke; 2003 - 2007 Ford 6.0L Powerstroke; 2008 - 2010 Ford 6.4L Powerstroke; 2011 - 2016 Ford 6.7L Powerstroke.