Eaton Posi limited-slip | Ford 8.8″ Rear | 31 Spline Axles | All Gear Ratios

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.

Specs

Part Number: 19588-010

Traction Type: Eaton Posi limited-slip

Carrier Break: All Gear Ratios

Differential: Ford 8.8″

Vehicle Fitment

• 1983 – 1996        Ford       Bronco
• 1983 – 2002        Ford       E-150 Econoline
• 1983 – 1988        Ford       E-250 Econoline
• 1991 – 2015        Ford       Explorer
• 1997 – 2015        Ford       Expedition
• 1983 – 2014        Ford       F-150
• 1983 – 1992        Ford       F-250
• 1986 – 2014        Ford       Mustang
• 1999 – 2001        Ford       Ranger
• 1987 – 1988        Ford       Thunderbird
• 2005 – 2011        Ford       Crown Victoria
• 2001 – 2011        Mercury                Grand Marquis
• 1997 – 2010        Mercury                Mountaineer
• 2003 – 2004       Mercury               Marauder
• 2003 – 2005       Lincoln                Aviator

Download EATON Application Guide PDF

Operation

The Posi prevents wheel slip before it can get started. Racebred carbon disc clutch packs, preloaded by a central spring assembly, are located behind each differential side gear. When torque input changes (one wheel slips), the clamping load on the clutch packs increases, causing them to smoothly transfer power to the other wheel as needed.

Performance

The Eaton Posi is smooth and automatic, requiring no driver input. Featuring pyrolytic carbon clutches and a rebuildable design, the Posi can be custom tuned for your desired performance.

Lubrication

A quality, petroleum-mineral based, GL5 rated 80w-90 gear oil should be used. It is necessary to add a four-ounce bottle of friction modifier for optimum performance (if friction modifier has not already been added to the petroleum-mineral based gear oil).

Features

• Superior rebuildable design
• Race-bred carbon friction discs
• Limited-slip operation
• Smooth and automatic engagement – no driver action needed
• Tunable via various spring packs (a.k.a. pre-loads)