Description
QU40233 1999-2002 Ford Un-Shielded Outer Axle Shaft to Knuckle Seal (Also referred to as a wheel seal) is a genuine original equipment part that will directly replace the Unshielded original equipment Knuckle to Axle Shaft seals used on 1999-2002 Ford Super Duty® Dana-Spicer Model 50 and 60 Front Axles and in the Model 50 front axle used in 2000-2002 Ford Excursions. QU40233 will also work on 2003-2005 axle shafts that originally had QU20035 Shielded Seals. See Tech Note 2.
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Dan the Gear Man® Tech Notes:
4x4 Tech Publication
Original 1st Design
About Knuckle Seal Installation
Using Shop Press
Seating Axle Shaft Assembly
Applications
Video
Tech Note 1: 4x4 Tech Publications
QU40233 is item 16 in the Shaft, Hub, Brake, and Steering Components Full Color Exploded View that is included in these 4x4 Tech Publications: TSB4644, TM4637, and TM4688. Service Procedures for installing this Seal is covered in these 4x4 Tech Publications: TSB4591, TM4637, and TM4688.
Tech Note 2: Original 1st Design
About Knuckle Seal Design Change: This unshielded Seal is the original 1st design knuckle seal design that was used from 1999 to early 2002. A 2nd design, (QU20035) redesigned seal with a metal deflector shield on the inboard side was introduced in 2002 calendar year as a 2003 model year part. The early QU40233 seals will work on all 1999-2004 Super Duty's. The later, QU20035 shielded seal will only fit outer axles with a step diameter of approximately 3.115". Most Trucks built prior to mid-2002 will have outer shafts with a step diameter of 3.210" which will not accept the shielded seal. We recommend you order replacement seals that match the seal type your truck originally came with. Our new, QU40318 series replacement outer axle shafts have the 3.115" step and can be used with either seal style.
Tech Note 3: About Knuckle Seal Installation
Ford Excursion and 1999 to 2004 Ford Super Duty® axle shaft to knuckle seals are just about the toughest seals to install we have ever come across. The seal is of a complicated unitized design that is easily damaged without the correct installer. In fact, the knuckle seal is virtually impossible to install without damage unless a tool like our one piece, rugged 12 pound QT1515 Knuckle Seal Installer is used to drive or press the seal on. Not only is the seal an extremely tight fit to the shaft, it also must be installed to a specific depth on both the axle shaft and in the knuckle. A damaged seal will allow water to enter and vacuum to escape.
Tech Note 4: Using Shop Press
Image 2 above using a shop press and a QT1515 Seal Installer to press a Knuckle Seal to the required position on an outer axle shaft. (You can also strike the QT1515 with a good sized hammer to drive the Seal on.)
Tech Note 5: Seating Axle Shaft Assembly
Image 3 above using QT1515 Knuckle Seal Installer to seat the axle shaft assembly into the steering knuckle to the correct depth.
Applications:
Ford:
Ford F-250, F-350, F-450, and F-550 4x4 trucks: 1999, 2000, 2001, 2002, 2002.5
Ford Excursion 4x4s: All 2000, 2001, 2002, 2002.5
WILL ALSO WORK ON NEWER SUPER DUTY MODELS TO 2004 AND EXCURSION TO 2005
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