Steel Spool For Dana 44 With 30 Spline Axles, 3.92 & Up USA Standard GearUSA Standard Master Overhaul kits let you finish your install with confidence. Fits Chrysler Dana Spicer 44 with 30 spline axles 3. 92 and up ratio only Provides 100 percent traction to both wheels at all times Not recommended for street driven vehicles 1 year warranty against Manufacturer defect Features and Benefits: Fits Chrysler Dana Spicer 44 with 30 spline axles 3. 92 and up ratio only Provides 100 percent traction to both wheels at all times