Drivetrain Differentials and Rear-End Components

Rigid Axle

Limited-Slip Differential Carrier

$677.00

SKU: POSI-F8.8-28-RA

In Stock
In Stock
Ships by Aug 5
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Rigid Axle POSI-F8.8-28-RA is a limited-slip differential carrier engineered for Ford 8.8-inch 10-bolt axles, fitting models from 1981 to 2014. The carrier itself is forged from high-strength steel, ensuring durability and reliability for a wide range of applications. This positraction unit is built to be serviceable and rebuildable, offering long-term value. Its design makes it a versatile choice, ideal for daily drivers seeking improved grip, weekend warriors tackling varied terrain, or those utilizing their vehicles for towing. It is also well-suited for basic off-road excursions and street/strip performance builds. The package includes the limited-slip positraction carrier. Rigid Axle recommends using non-synthetic GL-5 gear oil and a friction modifier for optimal performance. A 1-year warranty is provided with this product.

MIA's Description

The Rigid Axle POSI-F8.8-28-RA is a limited-slip differential carrier designed for Ford 8.8-inch 10-bolt axles. This Eaton-style unit utilizes carbon fiber and steel friction plates for enhanced traction. The carrier case is constructed from forged steel for durability and can be rebuilt and serviced.

It is suitable for daily drivers, weekend warriors, towing, basic off-road use, and street/strip applications. The product includes the limited-slip positraction carrier and comes with a 1-year warranty. Non-synthetic GL-5 gear oil and a friction modifier are recommended for use with this differential.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRigid Axle
Part NumberPOSI-F8.8-28-RA
CategoryDrivetrain

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy