Eaton Posi Differential 30-Spline for 8.5-Inch and 8.6-Inch Applications, Part Number 19559-010

The Eaton Posi limited-slip differential is the perfect way to control traction in street rods, light duty pickups and all types of tarmac running race cars. Featuring pyrolytic carbon clutches, rebuildable design, net-forged gears for added strength and seamless, automatic operation. Eaton Posi® Differential; 30 Spline; 1.32 in. Axle Shaft Diameter; 2.73 And Up Rng Gear Pin. Rat;Manual Locking Hubs Are Recomnd For Some Appl.; 8.5 in./8.6 in.;

• Tunable via various spring packs [a.k.a. pre-loads]
• Pyrolytic Carbon Clutch Disc Technology
• Clutch Type Limited Slip Differential
• Smooth; Automatic Engagement
• Precision-Forged Gears
• Prevents Wheel Slip
• Rebuildable

The Eaton Posi® limited-slip differential is engineered to improve traction and power delivery in street rods, light-duty pickups, and tarmac racing vehicles. Designed for compatible 8.5-inch front/rear and 8.6-inch rear axle applications, this clutch-type differential helps control wheel slip while maintaining smooth, automatic engagement during everyday driving and performance use.

Built with Eaton’s pyrolytic carbon clutch disc technology, the differential provides durable, consistent operation under demanding conditions. Its precision-forged gears are designed for added strength, while the rebuildable construction allows service and future performance tuning. Various spring packs, also known as pre-loads, can be used to adjust differential behavior for specific traction requirements.

• Brief Description: Rebuildable Eaton Posi limited-slip differential for compatible 8.5-inch and 8.6-inch axle assemblies.
• Clutch Performance: Pyrolytic carbon clutch discs provide durable limited-slip operation and controlled torque transfer.
• Automatic Engagement: Smoothly manages traction without requiring manual driver input during normal operation.
• Adjustable Preload: Tunable with various spring packs to help tailor engagement and traction characteristics.
• Gear Strength: Precision-forged gears are engineered to withstand demanding street and motorsport applications.
• Traction Control: Helps prevent excessive wheel slip and improves power delivery to the wheels with available grip.
• Rebuildable Design: Serviceable construction supports maintenance and future rebuilding.
• Installation Guidance: Manual locking hubs are recommended for some applications; verify axle compatibility before installation.

Key Product Specifications and Technical Data:

• Brand: Eaton
• Part Number: 19559-010
• Product Type: Clutch-type limited-slip differential
• Spline Count: 30 spline
• Axle Shaft Diameter: 1.32 inches
• Ring Gear Compatibility: 2.73 and higher numerical ratios
• Axle Application: 8.5-inch front/rear and 8.6-inch rear configurations
• Operating Style: Smooth, automatic engagement

What’s Included: One Eaton Posi limited-slip differential assembly. Installation hardware, bearings, seals, lubricant, and setup components are not specified and should be confirmed separately.

Fitment: Intended for compatible street rods, light-duty pickups, and tarmac racing vehicles using the specified axle configuration, spline count, shaft diameter, and ring gear ratio. Confirm vehicle, axle housing, gear ratio, and manufacturer fitment requirements before ordering.

Features:

• Pyrolytic carbon clutch disc technology for durable, consistent limited-slip performance
• Smooth automatic engagement helps manage traction without manual driver input
• Tunable spring packs allow adjustment of differential preload characteristics
• Precision-forged gears and rebuildable construction support demanding applications and future service

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1