Hubs. Again. - Ford Powerstroke Diesel Forum
User Tag List

LinkBack Thread Tools Display Modes
post #1 of 3 Old 03-20-2011, 04:48 PM Thread Starter
Join Date: Oct 2010
Location: Entiat
Posts: 41
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Hubs. Again.

I know this is a problem of me not being able to use proper search terms or have the patience to sift through a million search results to find what I need, and not a lack of this being talked about before. So bear with me...

My hub(s) aren't grabbing in the auto setting anymore. Still no problem with them in lock, but it's getting to the time of year when I only need 4x4 now and again, and usually only grab it when I actually need it and am almost stuck, so it kinda sucks to switch to 4x4 and still be in 4x2.

So my main question... how long do I have before they stop grabbing in lock? I hear reference to these being vacuum actuated. Are they? If so, is this likely a failure of that system, and what are the typical weak points?

tek9tim is offline  
Sponsored Links
post #2 of 3 Old 03-20-2011, 04:50 PM
Mob boss

Jarrod B's Avatar
Join Date: Jul 2008
Location: Austin Texas
Posts: 26,762
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 59 Post(s)
Thanks: 23
Thanked 23 Times in 21 Posts
Feedback Score: 1 reviews
find the vac leak and repair. or just keep em manually locked. or lock em before hand in case you need em.

2006 Ford F250 CCSB FX4 6.0

1997 F350 CCLB 2WD 7.3
1999 F350 CCLB 4WD 7.3
2003 F350 CCLB FX4 6.0
Jarrod B is offline  
post #3 of 3 Old 03-21-2011, 09:24 AM
Compression Ignition Addict
dieselcrawler's Avatar
Join Date: Aug 2007
Location: New Martinsville, West Virginia
Posts: 3,151
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanks: 0
Thanked 46 Times in 44 Posts
Feedback Score: 0 reviews
I do not know from personal experiance, but my understanding is there is a seal in the knuckle that can cause problems as well... but the vaccum lines going to the hubs from the vac pump are the most common problem from what I've read here... the line from the vac pump dry rotted on my yellow truck, symptom is defrost only... it was cracked close to the vac pump, I cut the line back an inch, stuck it back on the pump, used a small zip tie as a hose clamp, and it's worked fine since last fall...


'99 E350 DRW Stahl 11' util box van, 7.3 PSD, stock. 138k SOLD

'00 F350 extcab, 9' utility bed, dually 221k

E'99 F250 extcab, S/Bed 211k

'00 Excursion Limited, 7.3PSD 281k

'84 Chevy K-30, 6.2L TD, woods/trail beater. 141k

Semper Paratus
dieselcrawler is offline  
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