Description
QU40538 Original Design 2005-2010 Ford Super Duty® and 2005-2009 Chevy or GMC C4500, C5500 Inner Axle Shaft Dust Seal is the original type of Dust Seal used by Ford and GM to keep dust and grit out of the axle tubes. This type of seal get pushed into place on the inner axle shaft right next to the yoke. When installed, the lip will contact the end of the axle tube. Made in Italy. Sold individually, order two seals per vehicle. Available while supplies last.
When sold out, see replacement TK40538 Axle Shaft Dust Seal for Kodiak and TopKick applications, or QU20049 for Ford applications.
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Dan the Gear Man® Tech Notes:
Seal Life
Cartridge Seal Replaced Original Design
To Install
Matching Part for Ford
Matching Parts for Chevy and GMC
Dust Seals are NOT Oil Seals
Applications
Tech Note 1: Seal Life
For maximum life, the contact lip of the seal should be lightly lubed with a light grease or similar lubricant.
Tech Note 2: Cartridge Seal Replaced Original Design
QU20049 cartridge type seal replaced QU40538 Dust Seal which goes on the inner axle shafts next to the u-joint yoke. QU40538 contacts the outer end of the axle tubes and it was used on most, but not all 2005-2010 Super Duty 4x4s. Axle shafts made for the QU40538 seal have part of the yoke machined away to create a ledge for the QU40538 to fit onto. QU20049 was used on some 2008-2010 models and nearly all 2011 to current trucks. QU20049 is a better, longer lasting seal under most conditions, however there are a couple of drawbacks. To use this type of cartridge seal, you have to remove the axle shaft guides from the inner axle shafts. Without those guides, getting the inner axle shaft to enter your QU40244 inner axle oil seals located next to the differential is tricky, especially with the long, right side axle shaft. The other drawback is if water or crud gets past the seal it will stay in the axle tubes until the axle is disassembled. While this may not affect a high percentage of Super Duty 4x4s, it can and does happen. QU20049 Seal can be used on all 2005-current Super Duty 4x4s. QU40538 Seal can only be used on axle shafts that were originally made for it.
Tech Note 3: To Install
These seals are a fairly light friction fit on your inner axle shaft. The only special tool you need to install these are your two thumbs to push them on. If you do not install your axle shaft right away, you may find the seal has "popped" off the shaft shoulder. This is normal. Just push it back in place and install the axle shaft. Once the axle shaft is installed in the axle housing, the seal will stay on.
Tech Note 4: Matching Parts for Ford
Matching Parts for QU40538 Dust Seal:
QU40244 Axle Shaft Oil Seal
QK4807 Fixed Depth Inner Axle Seal Kit
QK4644 Adjustable Depth Inner Axle Seal Kit
QU20049 Outboard Axle Shaft Cartridge Type Dust Seal
QU20052 Outer Axle Shaft to Steering Knuckle Seal
QU20582 Left Axle Shaft Assembly for F250, F350
QU20305 Right Axle Shaft Assembly for F250, F350
QU40580 Left Axle Shaft Assembly for F450, F550
QU40581 Right Axle Shaft Assembly for F450, F550
Tech Note 5: Matching Parts and Axle Tools for Chevy and GMC:
QK4988 Greaseable Ball Joint set, 1 Side
QA40372 Spindle Bearing and Seal Kit incls QU40243 Seal, QU40496 Seal/Thrust washer, QU40149 Bearing
QU40244 Inner Axle Shaft Oil Seal
QU30468 Wheel Seal
QU52356 Hub Cap O-Ring
TK4783 Wheel Bearing Kit
TK40562 Axle U-Joint
QU20088 Spindle Nut
QT1215 Spindle Nut Socket
Tech Note 6: Dust Seals are NOT Oil Seals
QU20049 and QU40538 Dust Seals are designed to keep dust and crud from getting into your axle housing tubes, they are NOT oil seals!. If you see evidence of differential oil seeping out of the ends of you axle housing, the inner axle seals located next to the differential are leaking. To replace the inner axle seals, you need to remove the differential from the housing to access the seals. For Inner Axle Oil Seals see QU40244 (Original equipment 2005-2010 for both Ford and GM) and QU20463 (2nd Design Seal, original equipment 2010-up Ford, but also fits all 2005-current Ford and 2005-2009 GM).
Applications:
Chevy and GMC:
C4500, C5500 4x4 Trucks: 2005, 2006, 2007, 2008, 2009
Ford:
Ford F-250-F550 Super Duty® 4x4 with Dana 60/Super 60 Front Axle: 2005, 2006, 2007, 2008, 2009, 2010
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