4x4 problems - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-26-2012, 07:58 AM
Member
 

Join Date: Feb 2008
Posts: 62
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
4x4 problems

Ive got a 2004 f-250 with esof and it will not go into 4x4...i have tried auto and manual, both high and low range...it just stays in 2wd...transfer case locks in, but hubs wont engage...with blower on it doesnt go to defrost so should i still think vaccum or is it the hubs themselves...also, if it is the hubs, should i go with warn manual lockers (cheaper than oem autolockers) ?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 11-26-2012, 08:07 AM
Powerstroke.org Fanatic
 

Join Date: Apr 2010
Posts: 124
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Yes. You have a vacuum leak. The hubs have O-Rings inside. They come apart pretty easily. I would start there. There are some write ups on this site for your problem.
Reply With Quote Quick reply to this message
  #3  
Old 11-26-2012, 08:33 AM
Premium Member

 

Join Date: Sep 2008
Location: Oakbank, Manitoba
Posts: 2,832
Thanks: 6
Thanked 71 Times in 65 Posts
Feedback Score: 0 reviews
With the ESOF, the transfer case will not lock in until the hubs are locked and the switch has been selected. The logic is designed to prevent the TC from engaging until the input shaft is synchronized. You need the switch in the 4x4 position and the vacuum pressure to engage the hubs or the TC will not engage nor will the light illuminate. I believe manually locking the hubs will override the vacuum for the logic, but it has been a while troubleshooting one of these.

The hubs should lock manually. It is highly unlikely the internals would both break at the same time.

You need to check the switch/motor position on the TC to see if it working. You can visually check if it is engaged. After 20-30 seconds it times out if it does not make it to a new position. remember for 4x4 low you also need very low speed or stopped, a brake signal and neutral for it to shift into low.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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
Display Modes

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



All times are GMT -8. The time now is 08:28 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors