9.75IRS Axle Assembly 2005-06 Ford Expedition 3.31 Ratio; Posi

9.75IRS Axle Assembly For over 30 years, Zumbrota Drivetrain has been serving a nationwide customer base with premium drivetrain solutions. We offer a complete range of new, remanufactured, OE replacement, and performance manual transmissions, transfer cases, and differentials. Additionally, we provide high-quality components for rebuilding and repairs, ensuring top performance for various makes and models of foreign and domestic passenger cars, SUVs, and light-duty trucks.

Unmatched Expertise in Rear Differentials

Many companies claim to offer rear differentials, but at Zumbrota Drivetrain, we set ourselves apart by truly understanding what it takes to deliver a high-quality remanufactured rear differential assembly. For nearly three decades, rear differentials have been a core part of our business, and we take pride in our superior craftsmanship.

We never cut corners or rely on marketing—our products speak for themselves. Whether it’s for passenger vehicles, off-highway vehicles (OHV), race cars, or pulling trucks, we do it all.

Rear Differential Features: 9.75IRS Axle Assembly

Precision Engineering & Quality Control

• All tubes are meticulously inspected and straightened to OEM.
• Housings undergo comprehensive testing for surface wear and cracks.
• Every internal component, including rings and pins, internal gears,and carriers, undergoes 100% inspection.

Optimized Performance & Longevity

• Precision rolling torque settings using inch-pound measurements for accurate setup.
• Correct backlash clearance is set to maintain proper gear lubrication and minimize noise.

Note: A refundable core charge will be added to the purchase price.

Product Details: 9.75IRS Axle Assembly

• Ratio: 3.31
• Type: Rear Differential
• Ring Gear Size: 9.75 Inch
• Model: Ford 9.75
• Configuration: IRS
• Production Date: From 11/29/04
• Feature: With Posi Traction

Compatible Vehicles

•  2005- 2006 Ford Expedition Ford 9.75″