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Make sure this part fits

Lincoln 4L1Z-4K138-AC Shaft Assembly

2004-2005 Lincoln Navigator 4L1Z4K138AC

Customer Questions & Expert Answers (3)
4L1Z-4K138-AC Ford Shaft Assembly Illustration 1 of 1
4L1Z-4K138-AC Ford Shaft Assembly Illustration 1 of 1
  • Part Description
    Shaft Assy
  • Base No.
    4K138
  • Position
    Passenger Side
  • Manufacturer
    Ford
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine Lincoln
    Base No.4K138
    Manufacturer Part Number4L1Z-4K138-AC, 4L1Z4K138AC
    Part DescriptionShaft Assy
    Other NamesAxle Assembly
    Item Dimensions44.5 x 5.7 x 5.5 inches
    Item Weight31.10 Pounds
    PositionPassenger Side
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerFord
    SKU4L1Z-4K138-AC
    WarrantyThis genuine Ford part is guaranteed by Ford's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65

  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2004-2005 Lincoln Navigator8 Cyl 5.4L, 8 Cyl 5.4L DOHC EFI4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)

  • Customer Questions & Expert Answers

    Q:
    Is this the correct part for the attached VIN?
    A:
    You can Select Your Vehicle to check if 4L1Z-4K138-AC fits your vehicle.
    Posted and answered by Ford Parts Specialist Matthew
    Q:
    What should you do to prevent the 2005 Ford Expedition from rolling off the stands when working on the Axle Shaft? Posted by Sonja C.
    A:
    Block the rear wheels. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist George / Jun 15, 2025
    Q:
    What is the first step for removing the front Axle Shaft (driveaxle) on the 2005 Lincoln Navigator? Posted by Rex N.
    A:
    For 2005 and later models, start by removing the hub dust cap and driveaxle nut. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist Patrick / Nov 19, 2023

Genuine Ford Part 4L1Z-4K138-AC, the Right Choice

To ensure reliability, purchase part # 4L1Z-4K138-AC Shaft Assembly. It is also called Axle Shaft. OEM parts are of high quality and known for their longevity. This is because they are built to the Ford standards which are relatively high and undergo rigorous quality control testing. This part fits specific Lincoln Navigator models.

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