Yukon 14T & GM 11.5in 30 Spline 38.2-42.2in Cut-To-Fit Axle Shaft 4340Yukon 4340 Chrome Moly rear axle for GM 10. 5" 14 bolt truck and 11. 5", 30 spline. This is a cut to fit axle which fits 38. 2" to 42. 2" applications. Yukon 4340 Chrome Moly alloy axles offer a strength increase over stock while retaining a low cost. Yukon 4340 Chrome Moly alloy rear axles come with a limited lifetime warranty against manufacturing defects. Please verify bolt pattern on 2011 & later models. This axle has a 3. 562" bolt pattern. Some