For 99-06 Ford 4X4 F250 F350 Super Duty Excursion Diesel Front Drive Shaft

What is For 99-06 Ford 4X4 F250 F350 Super Duty Excursion Diesel Front Drive Shaft?

This is a complete front drive shaft assembly built to replace the worn or failing factory unit on 1999-2006 Ford F-250 Super Duty, F-350 Super Duty, and Excursion diesel 4WD models. Sold by Lab Work Auto and cross-referenced to OE part numbers 65-9303, 938-305, YC3Z4A376EA, F81Z4A376MA, and 5C3Z4A376D, it transfers power from the transfer case to the front differential whenever 4WD is engaged. It is intended as a direct bolt-in replacement for trucks suffering from vibration, clunking, or U-joint failure in the front driveline.

Key features

• Direct-fit replacement — engineered to original factory specifications for a precise match to the OE shaft.
• Broad diesel application — covers Lariat, XL, XLT, Limited, Eddie Bauer, and King Ranch trim levels across F-250, F-350, and Excursion platforms.
• Transmission flexibility — fitments listed for both automatic and 6-speed manual configurations, single rear wheel setups.
• Double inspection process — each shaft is hand-checked off the production line and again before shipment to catch defects early.
• Multiple OE cross-references — verified against five Ford part numbers to simplify confirmation against your existing shaft.
• Bolt-on installation — uses the factory mounting points and flange pattern, so no driveline modification is required.
• Aftermarket value pricing — priced well below dealer replacement cost while targeting OE-level reliability.

Who is For 99-06 Ford 4X4 F250 F350 Super Duty Excursion Diesel Front Drive Shaft for?

This shaft is aimed at owners of late 7.3L and early 6.0L Power Stroke Super Duty trucks and Excursions who are dealing with driveline vibration, slip-yoke wear, or seized U-joints. It suits competent DIY mechanics with a jack, stands, and basic hand tools, as well as independent diesel shops handling customer repairs. Work trucks, tow rigs, and off-road 4WD vehicles that rely on the front driveline under load are the primary use cases.

How does For 99-06 Ford 4X4 F250 F350 Super Duty Excursion Diesel Front Drive Shaft compare?

Compared to a Ford dealer replacement, this aftermarket assembly offers a significantly lower out-the-door cost while matching the original mounting geometry. Against budget rebuild kits that only replace U-joints and center supports, it delivers a complete ready-to-install shaft, saving press-work and bench time. And unlike used yard-pulled shafts of unknown mileage, every unit ships new and inspected, removing the guesswork around remaining service life.