2011-2016 Chrysler 11.5" AAM Rear - Truetrac Style Limited Slip Posi Package w/ Master Bearing Kit Ratio::4.30 That means if you have

That means if you have a 2

Chevrolet C4500 Kodiak (2003-2007)

31 ratio from the factory

or Grand Sport with 30 spline pinion & mainshaft

2011-2016 Chrysler 11.5" AAM Rear - Truetrac Style Limited Slip Posi Package w/ Master Bearing Kit Ratio::4.30 That means if you haveChrysler 11. 5" Hell Posi Package Description Package Includes: (1) Rigid Axle "HELL" Positraction Carrier (1) Ring and Pinion Gear Set (Choose Ratio Above) (1) Differential Master Bearing Install Kit *Note: The Chrysler 11. 5" AAM rear differential had a design change in mid 2011. The early design has a rear pinion race with an O. D. of 4. 125". The later design has an O. D. of 4. 375". This master bearing install kit is for the 4. 375" O. D. size.