Heavy Duty 8.875 Inch Posi Unit Differential Assembly Featuring 30 Spline Y Knob Compatible With 12 Bolt Rear Axles Engineered For Rock Solid Torque Delivery And Smooth Shifting Across 3.07 Through 3.90 Ratios Built Damn Tough For Street Use

Heavy Duty Posi Differential Setup For 12 Bolt Rear Ends
✔️ 30 spline y knob config matches 3.07 up to 3.90 axle ratios

This single differential unit replaces worn factory assemblies in street trucks and classic coupes You bolt it between your driveshaft and brake lines to lock power straight down the center tube while shedding unnecessary drivetrain slack

✅ Heat treated ring gear holds firm against constant road impacts
✅ Precision ground bearings cut friction for quick engagement shifts
✅ Reinforced carrier tubs flex less under heavy towing pressure
✅ Fully assembled package fits you perfectly without extra machining hacks

💡 How does a rebuilt posi differential improve torque distribution for high horsepower builds?
Swapping to a posi carrier gives you immediate traction gains and handy grip when you hit the gas hard.
- Hardened spline couplings grip axles tighter so you keep full power at peak rpm - Precision ring gears mesh smoothly to deliver steady torque to both sides - Robust seal kits lock fresh lubes inside while deflecting road spray

✝️