Ford, Lincoln (4.6, 5.4 - 4WD/RWD) Drive Axle Assembly - Rear - Zumbrota Drivetrain - RAA440-1383B

Rear Axle Assembly
RAA440-1383B
Ratio: 3.73; Ford 9.75 Inch Ring Gear, IRS, Without Posi Traction
,03,05,3.73,440-1383B,9.75IRS,ASSY,AXLE,DIFFS,EXPEDITION,FORD,RAA,
Reman Axle Assembly for Ford 9.75IRS 03-05 Ford Expedition 3.73 Ratio
9.75IRS AXLE ASSY '03-'05 FORD EXPEDITION and NAVIGATOR 3.73, OPEN
9.75IRS AXLE Assembly 03-05 FORD EXPEDITION 3.73 .
Zumbrota Drivetrain Axle Assemblies are rebuilt to the highest quality standards of precision and reliability. Each Axle assembly is thoroughly inspected for straightness, cracks and surface wear. All internal components are fully inspected and tested including ring and pinions, internal gears, clutches and carriers. All bearings and seals are replaced. Gears are fully inspected for optimal tooth contact patterns and correct rolling torque using inch pound measurements for precise setup and longevity. Correct gear backlash is set to ensure proper gear lubrication and quiet operation. Axle tubes are inspected to ensure OEM standards of straightness. Zumbrota uses an exclusive hydro-blast rinse and sandblasting procedure on internal and external parts, followed by a proprietary shot-enticed deep cleaning, setting the standard for Axle assembly remanufacturing.
Units are shipped in high density plastic totes to help eliminate in-transit damage
All housings are tested for surface wear and cracks.
100% inspection of all internal parts, including Ring and Pinion’s, Internal Gears, Clutch’s and Carrier’s
100% replacement of bearings, seals, crush sleeves, pinion nuts and shims.
All housings are cleaned utilizing our state of the art hydro blasting and rinsing process. This process is what brings all cases back to the OEM finish.
Correct rolling torque established using inch pound measurement’s for precision setup and longevity
Need Help?
If you are having trouble choosing the correct Zumbrota part, or experiencing issues during or after installation of this part, our technicians are available to help troubleshoot, please message us directly with questions
Units are shipped in high density plastic totes to help eliminate in-transit damage
All housings are tested for surface wear and cracks.
100% inspection of all internal parts, including Ring & Pinion’s, Internal Gears, Clutch’s & Carrier’s
100% replacement of bearings, seals, crush sleeves, pinion nuts and shims.
All housings are cleaned utilizing our state of the art hydro blasting and rinsing process. This process is what brings all cases back to the OEM finish.
Correct rolling torque established using inch pound measurement’s for precision setup and longevity
California Proposition 65: WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.
Gear Ratio: 3.73

Detailed Fitment Results
Year Make Model Sub Model Body Type Drive Type Bed Length (in) Fitment Notes 2003 Ford Expedition Eddie Bauer / XLT RWD / 4WD Ratio: 3.73; Ford 9.75 Inch Ring Gear, IRS, Without Posi Traction 2003 Lincoln Navigator Base 4WD / RWD Ratio: 3.73; Ford 9.75 Inch Ring Gear, IRS, Without Posi Traction 2004 Ford Expedition Eddie Bauer / XLT / NBX / XLS / XLT Sport RWD / 4WD Ratio: 3.73; Ford 9.75 Inch Ring Gear, IRS, Without Posi Traction 2004 Lincoln Navigator Base 4WD / RWD Ratio: 3.73; Ford 9.75 Inch Ring Gear, IRS, Without Posi Traction 2005 Ford Expedition Eddie Bauer / Limited / XLS / XLT Ratio: 3.73; Ford 9.75 Inch Ring Gear, IRS, Thru 11 / 28 / 04, Without Posi Traction 2005 Lincoln Navigator Base Ratio: 3.73; Ford 9.75 Inch Ring Gear, IRS, Thru 11 / 28 / 04, Without Posi Traction