I Apologize I havent been working on the truck lately, other complications. But I'm unabble to verify the splines, I'll let you know if I ever find outI have a spare carrier and a spare axle lying around. How many splines do your axle shafts have? It should be a 28-spline axle, but later trucks got 30-spline axles. If it's 28, I may be able to help.