O ring behind front hubs
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Freshman User
Joined: Jul 2006
Posts: 37
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O ring behind front hubs
I was greasing the front u-joints this morning on my 06 SD and noticed rubber seal like things that apparently go on the ends of the front axle tube flopping around. What are these for and how hard would it be to replace them. I assume they are seals of some kind.
Cargo Master
Joined: Apr 2006
Posts: 3,215
Likes: 8
From: WV
Are you talking about the dust seal that is attached to the axle and rides at the entrance to the axle tube?
I don't know how the '06 models are set up but replacing them on '04 and earlier is a little bit involved. Actually replacing the seal is easy. Getting to them is the involved part. You have to remove the brakes, the hub, the bearing assy, and then the axle shaft (likely damaging the big axle seal in the process). Any of those steps can be a bear sometimes.
I don't know how the '06 models are set up but replacing them on '04 and earlier is a little bit involved. Actually replacing the seal is easy. Getting to them is the involved part. You have to remove the brakes, the hub, the bearing assy, and then the axle shaft (likely damaging the big axle seal in the process). Any of those steps can be a bear sometimes.
Senior User
Joined: May 2003
Posts: 286
Likes: 0
From: Frederick MD & missing AK
I misread your original post. I thought you were replacing your front u-joints, which led me to believe that you would not find it hard to replace the seals. You would have had most of the work done already.
Sorry for the confusion.
Sorry for the confusion.
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
They pop off a lot and aren't a big deal. You can try putting some seal adhesive on them and poking them back in with a screwdriver.
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More Turbo
Joined: Dec 2002
Posts: 743
Likes: 2
From: MI -- farmboy
heck, even the dealer told me not to get too excited about the dust seals. If you have the front end apart, they are cheap and easy to change, but I would never tear down the front to change just the dust seal. I think I only have 2 trucks that still have them intact. they are more cosmetic than anything, just try not to lose any sleep over it.
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