9.25 Inch 12-Bolt 31-Spline Limited Slip Differential Replacement For Chrysler, Dodge, Ram, Plymouth - Posi Rear End Case Assembly 5161549AA YDGC9.25-31-1 Fits Classic 1970s 1980s Models Like Fury GTX Road Runner Imperial New Yorker B100 B150

9.25-Inch 31-Spline Limited Slip Case, Single Unit
✔️ Posi rear end case, 12-bolt, 31-spline, QT450 steel

Replace a worn or damaged differential case on classic Chrysler, Dodge, Ram, and Plymouth 9.25-inch 31-spline rear axles. This aftermarket unit covers many 1970s-2010s models, delivering a solid foundation for the limited-slip Positraction system.

✅ 9.25" 31-spline, 12-bolt posi unit
✅ OE numbers YDGC9.25-31-1, 5161549AA
✅ Material: QT450 steel for strength and durability
✅ Replacement for multiple Chrysler, Dodge, Ram, and Plymouth apps
✅ Direct-fit for 9.25" 31-spline axles in classic to late-model vans and trucks

💡 What is a differential case and why replace it in classic vehicles?

A quick, handy explanation to help buyers decide when to replace the case.

• classic Chrysler 9.25-inch rear axle differential case replacement for better traction
• 9.25-inch 31-spline posi rear axle compatibility for Dodge, Ram, and Plymouth builds
• QT450 steel housing provides durability and proper gear alignment
• easy swap on 1970s-2010s models when upgrading to a factory-style posi