Speedway Motors Helical‑Gear Style Differential 9 Inch 31 Spline High Performance Gear-Style Limited Slip Carrier for 9″ Rear End Axles, Quiet Traction Upgrade

Fits factory and aftermarket 9-inchCompatible with Ford differential housings. Uses stock sizedCompatible with Ford 9-inch differential carrier bearings. Designed for stock or aftermarket 31-spline axles. Internal helical gear differential design requires no friction modifier. Instant torque-biased application in forward or reverse. No friction material or clutches to wear out, causing slippage. Smooth operation with no ratcheting or unlocking when turning. Automatically applies torque to the wheel with highest traction. Works like an open differential while driving until maximum traction is needed. Maximum Traction for Your 9-InchCompatible with Ford Axle Equipped Hot Rod, Muscle Car, or Truck When it comes to the venerableCompatible with Ford 9-inch axle it has probably found a home under more vehicles at this point than ever came fromCompatible with Ford’s factories with one. The 9-inch axle is known for its great strength and has become the “go to” axle for everything from road racing and drag racing, to high horsepower street cars, and more for over half a century. Due to this popularity and demand, theCompatible with Ford 9-inch axle can be built from mild to wild with all manner of parts to suit your exact needs and budget. One area that needs immediate attention for anyone considering swapping in a 9-inch axle to their build, or perhaps already has one in place, is the differential itself. While the 9-inch is the performance axle king, many of the 9-inch axles you’ll find used are in factory form and in reality, very few of the original 9-inch axles came with any sort of posi or limited slip differential Compatible with Ford used the terms Equa-Lock and Traction Lok for their version of a posi unit), especially the car-based 28-spline axle models. Taking your 2.80 geared open differential 9-inch and upgrading to a performance gear ratio and some form of limited slip-style differential will provide the best traction for your performance dollars

• Performance Differential Upgrade: Gear-style helical differential designed for Compatible with Ford 9″ axles with 31 spline setup, providing optimized torque distribution under acceleration and traction conditions.
• Precision Engineering: Works with factory and aftermarket Compatible with Ford 9″ differential cases, ring gears, 31 spline axles, and carrier bearings for a direct replacement application.
• Maintenance-Free Operation: Helical gear design requires no special friction modifiers or additives and delivers smooth, quiet performance without clicking or unlocking in corners.
• Enhanced Traction: Instant torque biasing in both forward and reverse helps put power to the wheel with the highest traction, improving acceleration and control.
• Durable Build: Robust internal gear construction offers long-lasting performance for street rods, classic muscle cars, and daily-driven vehicles with a Compatible with Ford 9″ rear end.