2001 PSD - LF outer diff. seal replacement help - Ford Powerstroke Diesel Forum
  • 1 Post By NoRalPh
LinkBack Thread Tools Display Modes
post #1 of 2 Old 09-25-2012, 06:39 AM Thread Starter
Powerstroke.org Rookie
Join Date: Apr 2012
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
2001 PSD - LF outer diff. seal replacement help

Hey guys,

so I need to replace my LF hub/bearing and I just noticed that the LF outer seal is worn and there is play there. I almost have to think the play at the outer seal is what caused the bearing to wear out...

Any way I would like to replace the outer seal while I have things apart to do the bearing. Has anyone done this? does the LF driveshaft just slide out?

Anything else I should know?

blue89turbo is offline  
Sponsored Links
post #2 of 2 Old 09-25-2012, 08:51 AM
Compression Ignition Addict
Join Date: Dec 2007
Posts: 6,737
Thanks: 7
Thanked 320 Times in 309 Posts
Mentioned: 9 Post(s)
Quoted: 184 Post(s)
Feedback Score: 3 reviews
First thing is, Don't worry about the movement, it's actually supposed to move like that (and besides Seals don't Ever restrict movement...)

Next there are two seals there. One is called the "dust" seal and is at the end of the axle tube. It's pretty much a do-nothing kinda seal. Just there to keep foreign debris from wedging between the axle & tube. You don't even need it really,,, I would replace it if you're in there already but, Never take it all apart just for IT (and yes, the axle will just pull out through the Hub)

The other seal is in the hub and called the Knuckle Seal. And here again, not restricting movement of any kind and something you only really need in "good shape" if you have Vacuum Hubs and want them to work properly. It's an expensive seal and you need to use a tool (that you can build from plumbing parts) to drive it in without damaging it.

If you just need to replace the bearing assembly, and have manual hubs, I wouldn't go any farther than that. I save the trouble & expense of replacing those seals and pulling the axle for doing the U-Joint.

A good web page with details of the bearing stuff -> Welcome to guzzle's 4x4 Needle Bearing Maintenance Web Page

And the tool if you need to replace the Knuckle Seal -> Ford Super Duty Knuckle Seal Tool - AKA OTC 6695 | Superdutypsd.com

That should about do it!
story53 likes this.
NoRalPh is online now  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome