9.75IRS Axle Assembly ’05-’06 Ford Expedition & Navigator 3.73 Ratio; Posi

9.75IRS Posi Axle Zumbrota Drivetrain has proudly served a nationwide customer base for over three decades. We specialize in providing a comprehensive selection of new, remanufactured, OE replacement, and performance manual transmissions, transfer cases, and differentials, along with high-quality components for rebuilding and repairs. Our extensive inventory supports a wide range of foreign and domestic passenger cars, SUVs, and light-duty trucks.

Why Choose Our Rear Differentials?

Any company can claim to offer rear differentials, but we understand what it takes to deliver a high-quality remanufactured rear differential assembly. With nearly 30 years of experience, rear differentials have been an integral part of our business. We prioritize quality, precision, and durability—without cutting corners or relying on marketing gimmicks. Whether you need a differential for a passenger vehicle, OHV, race car, or pulling truck, we’ve got you covered.

Rear Differential Features: 9.75IRS Posi Axle

Comprehensive Inspection & Testing

• All tubes are checked to ensure they are straightened to OEM specifications.
• All housings undergo rigorous testing for surface wear and cracks.
• 100% inspection of all internal parts, including Ring and Pinions, Internal Gears, Clutches, and Carriers.

Premium Quality Components

• 100% replacement of critical parts, including bearings, seals, crush sleeves, pinion nuts, and shims.
• State-of-the-art hydro blasting and rinsing process restores housings to their original OEM finish.

Note: A refundable core charge applies to product purchases.

Product Details: 9.75IRS Posi Axle

• Ratio: 3.73
• Rear Differential
• 9.75 Inch Ring Gear
• Ford 9.75 IRS
• From 11/29/04
• With Posi Traction

Vehicle Compatibility

•  2005- 2006 Ford Expedition Ford 9.75
•  2005- 2006 Lincoln Navigator Ford 9.75