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LIMITED SLIP DIFFERENTIAL

LIMITED SLIP DIFFERENTIAL

$549.00
$549.00
Sale Sold out

The Eaton Posi Performance Limited Slip Differential is the gold standard for traction in GM 10-bolt and 12-bolt rear axles used in classic muscle cars, street rods, and performance trucks. If you're building a Chevelle, Nova, Camaro, or C10 with serious power, the Eaton Posi delivers the torque bias you need to put the power down without the chatter of a spool.

Built around Eaton's proven helical-gear torque-sensing design, this differential offers a torque bias ratio of approximately 3.5:1—the wheel with grip gets up to 3.5 times the torque of the slipping wheel. It's rated for vehicles up to 500 HP and features hardened steel gears running in a nodular iron case with precision shim preload adjustment. The unit accepts standard ring gear bolts and uses existing axle bearings and carrier shims for simplified setup.

Unlike clutch-type limited slips that wear out and require periodic rebuilds, the Eaton Posi uses gear-to-gear engagement that never fatigues. There are no clutches to burn, no friction modifiers needed, and no degradation over time. It activates smoothly and predictably—hook a corner at WOT and you'll feel the inside tire get pulled into line without the drama of a locker in traffic. Street manners are civil enough for daily driving.

Stop leaving traction on the table. Install the Eaton Posi Performance Differential and actually put your horsepower to the pavement. Order yours today.
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Frequently Asked Questions

What is the torque bias ratio of this Eaton Posi limited slip differential for my axle?

Eaton Posi performance differentials typically feature a torque bias ratio of 2.5-to-1 to 3.0-to-1, meaning the wheel with traction receives up to three times the torque of the slipping wheel. This limited slip differential uses a clutch-pack design that engages smoothly when one wheel loses grip, making it ideal for street performance and light off-road use. The specific carrier case is machined from nodular iron and fits Dana, GM, Ford, and Chrysler axle housings depending on the part number.

How does the Eaton Posi limited slip differential behave on wet or icy roads?

The Eaton Posi limited slip differential provides predictable and controllable traction on wet or icy roads by automatically sending torque to the wheel with better grip before wheelspin occurs. It engages smoothly without the sudden lockup of a spool or the ratcheting noise of some locker differentials, making it safer for daily driving in inclement weather. With proper maintenance using limited-slip additive in the gear oil, the clutch pack delivers thousands of miles of consistent performance.

Do I need to add friction modifier to the gear oil with this Eaton Posi limited slip differential?

Yes, the Eaton Posi limited slip differential requires a friction modifier additive mixed into the gear oil to prevent clutch chatter during low-speed turns and to ensure smooth engagement of the clutch pack. Eaton recommends using a limited-slip additive with conventional 75W-90 or 80W-90 gear oil, or choosing a synthetic oil that already contains friction modifier. Adding the correct additive prevents chattering noises and premature clutch wear when turning sharply at parking-lot speeds.

What axle housing sizes does this limited slip differential carrier fit?

This Eaton Posi limited slip differential carrier is available for multiple axle configurations including 7.5-inch, 8.5-inch GM 10-bolt, 8.8-inch Ford, Dana 44, Dana 60, and Chrysler 8.25-inch and 9.25-inch ring gear sizes. Each carrier is machined to fit a specific ring gear bolt pattern and axle spline count, so you must match the carrier to your axle's ring gear diameter and spline count. Verify your axle's identification tag or casting numbers before ordering.

Can I install this Eaton limited slip differential in the front axle of my 4x4?

Eaton Posi limited slip differentials are primarily designed for rear axle applications, though some models are available for select front axles in part-time 4WD systems. Putting a limited slip in the front axle can affect steering feel because the clutches resist differentiating during turns, especially in parking lots or on loose surfaces. For front axles, many off-roaders prefer selectable lockers or limited-slip units specifically rated for front-axle use rather than rear-specific carriers.

What is the horsepower and torque limit for this Eaton Posi limited slip differential?

Eaton Posi limited slip differentials are rated to handle up to approximately 500 to 600 horsepower and similar torque figures depending on the specific carrier model and axle strength. The clutch-pack design provides reliable performance for street-driven muscle cars, hot rods, and light-to-moderate towing applications. For builds exceeding 600 wheel horsepower with sticky tires, Eaton recommends upgrading to their Detroit Truetrac helical-gear differential or a full spool for maximum strength.