M226 Ring and Pinion Set w/ 24-spline Pinion.

Some Titans were equipped with a 29-spline pinion from Nissan. In this case a 24-spline yoke is required.
2004 - 2006 OE Yoke/Gearset is 29 spline. 
2006 - 2015 OE Yoke/Gearset is 24 Spline.