QU20035 2nd Design Shielded Outer Axle Shaft to Knuckle Seal

QU20035 2nd Design Shielded Outer Axle Shaft to Knuckle Seal (Also referred to as a wheel seal) is a replacement part that will directly replace the shielded original equipment Knuckle to Axle Shaft seals used on 2003-2004 Ford Super Duty® Dana-Spicer Model 50 and 60 Front Axles and in the Model 50 front axle used in 2002-2005 Ford Excursions. QU20035 will NOT work on original 1999-2002 axle shafts that originally had QU40233 Unshielded Seals. Made in Taiwan. See Tech Notes.

Need More Info? Use the handy Links below to access over 40 years of Dan's product and vehicle specific Tech Notes to easily get the information you need for your vehicle's repair, maintenance, or upgrade project!

Dan the Gear Man® Tech Notes:
4x4 Tech Publications
Seal Design Change
Seal Installation
Applications
Video

Tech Note 1: 4x4 Tech Publications
QU20035 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.

Tech Note 2: Seal Design Change
(About Knuckle Seal Design Change) This shielded Seal with metal deflector to protect the seal from road debris is the 2nd design knuckle seal design which was used from 2003 to 2004 (Super Duty) or 2005 (Excursion). A 1st design, (QU40233) without the protective metal deflector shield on the inboard side was used on 1999-2002 axles. The early QU40233 seals will work on all 1999-2004 Super Duty's. The QU20035 Shielded Seal shown above 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: Seal Installation
(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.

Applications:
Ford:
Ford Super Duty Dana-Spicer Model 50 & Model 60: 2003, 2004
Ford Excursions: 2002, 2003, 2004, 2005

Video