Go Back   F150online Forums > F-Series Trucks > 2004 - 2008 F-150
Sign in using an external account
Register Forgot Password?
Register Photos Vin Decoder FAQ Members Search Today's Posts Mark Forums Read Vendor DirectoryGarage

2004 - 2008 F-150 SPONSORED BY:

Welcome to F150Online Forums!
Welcome to F150Online.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the F150Online Forums community today!





Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 03-10-2012, 02:26 PM
Member
Garage is empty, add now
 
Join Date: Feb 2012
Location: Prairieville, LA
Vehicle: 2005 Ford F150
Posts: 66
Diagnosing 4x4 problem

I've done alot of searching and have yet to see really anything that matches what my 4wd system is doing. My truck is an '05 screw fx4, with the electronic 4x4 shift switch. When I shift into 4wd (hi or lo) the light on the dash comes on and the transfer case DOES engage, so the case motor works. I replaced the soilonoid on the fire wall with the new design and my hubs still don't engage. I have NO grinding or clicking noises like everyone else has described. I have 2 new IWE actuators on the way, but I'm not 100% sure they are the problem. This has happened once before, but it was under warranty at the time and all the stealership said was "we changed a couple parts, but it's working now" so I have no clue what they changed. Any ideas, I've got no clue???
Reply With Quote
  #2  
Old 03-10-2012, 04:06 PM
Senior Member
Garage is empty, add now
 
Join Date: Dec 2008
Location: SE Mich.
Vehicle: 2005 Ford F150
Posts: 105
go to the auto parts store and buy a vacum pump....i got one from auto zone for about 20 bucks...hook it to the vacum line coming out of your solenoid going towards your iwe's...pump it up...watch the gauge...see if it holds a vacum....really easy to do...
Reply With Quote
  #3  
Old 03-10-2012, 05:56 PM
Member
Garage is empty, add now
 
Join Date: Feb 2012
Location: Prairieville, LA
Vehicle: 2005 Ford F150
Posts: 66
Yea, that's on the list of things to do. What has me puzzled is if I'm loosing vacuum, the hubs should "grind" or go ahead and engage. But I'm getting no noises or engagement from the hubs. That's the only thing that has me thinking that the IWE's may be frozen in the open position whether they have vacuum or not. Any other ideas?
__________________
2005 FX4 SuperCrew: 3" body lift, 6" SkyJacker suspension lift, BushWacker pocket style flares, Gryphon programmer, K&N intake, FlowMaster 40 series 3" SiSo dumped, 18" Ballistic Jester's, 37x13.50x18 Nitto Mud Grapplers
Reply With Quote
  #4  
Old 03-10-2012, 07:02 PM
Senior Member
Garage is empty, add now
 
Join Date: Mar 2001
Location: Rochester, NY, USA
Vehicle: 2014 Toyota Tacoma 4x4
Posts: 2,793
Quote:
Originally Posted by sethchid View Post
Yea, that's on the list of things to do. What has me puzzled is if I'm loosing vacuum, the hubs should "grind" or go ahead and engage. But I'm getting no noises or engagement from the hubs. That's the only thing that has me thinking that the IWE's may be frozen in the open position whether they have vacuum or not. Any other ideas?
It would be rare - but not impossible to freeze an IWE in the unlocked position. Having two of them do it is next to impossible. Are you sure they're just not locked instead? Jack the front end up and try turning each wheel. See if the half shafts turn. Do the same thing with the truck running. My bet would be that they're locked in (no vacuum) and you have a vacuum leak issue.
__________________


Lights Behind the Grill 2004-2008:http://www.f150online.com/forums/mem...ind-grill.html

Lights Behind the Grill 2009-2011:http://www.f150online.com/forums/ill...11-trucks.html
Reply With Quote
  #5  
Old 03-10-2012, 07:42 PM
Member
Garage is empty, add now
 
Join Date: Feb 2012
Location: Prairieville, LA
Vehicle: 2005 Ford F150
Posts: 66
Theyre deffinately not locking in. With the truck off or running in 4wd I can freely spin the cv's with my hand. Also I know they're not locking in because I got slap stuck in the yard with a trailer the other day in 4wd, back end pulling front sitting idle. So if they had failed in the "locked position" my front would be pulling. I am also sure the transfer case is working, because when the truck was stuck I got out of it with it in Low still in gear. It was wet enough that the back tires were just turning in the mud so I took a peek under the truck and the front drive shaft was turning. Just can't remember if the front axles were turning. May go outside in a little bit and put it on jackstands again and take a look. Is there anything that meshes the front chunk with the front driveshaft? Maybe my driveshaft isn't engaging the front chunk!!!
__________________
2005 FX4 SuperCrew: 3" body lift, 6" SkyJacker suspension lift, BushWacker pocket style flares, Gryphon programmer, K&N intake, FlowMaster 40 series 3" SiSo dumped, 18" Ballistic Jester's, 37x13.50x18 Nitto Mud Grapplers
Reply With Quote
  #6  
Old 03-10-2012, 09:08 PM
Senior Member
Garage is empty, add now
 
Join Date: Dec 2003
Location: Mount Airy,MD
Vehicle: 2009 Ford F150
Posts: 6,550
Quote:
Originally Posted by sethchid View Post
Theyre deffinately not locking in. With the truck off or running in 4wd I can freely spin the cv's with my hand. Also I know they're not locking in because I got slap stuck in the yard with a trailer the other day in 4wd, back end pulling front sitting idle. So if they had failed in the "locked position" my front would be pulling. I am also sure the transfer case is working, because when the truck was stuck I got out of it with it in Low still in gear. It was wet enough that the back tires were just turning in the mud so I took a peek under the truck and the front drive shaft was turning. Just can't remember if the front axles were turning. May go outside in a little bit and put it on jackstands again and take a look. Is there anything that meshes the front chunk with the front driveshaft? Maybe my driveshaft isn't engaging the front chunk!!!
No, the only disconnect on 04 up is the IWEs.
Reply With Quote
  #7  
Old 03-10-2012, 09:19 PM
Member
Garage is empty, add now
 
Join Date: Feb 2012
Location: Prairieville, LA
Vehicle: 2005 Ford F150
Posts: 66
Worst case, I was thinking blown ring gear, but I doubt it.
__________________
2005 FX4 SuperCrew: 3" body lift, 6" SkyJacker suspension lift, BushWacker pocket style flares, Gryphon programmer, K&N intake, FlowMaster 40 series 3" SiSo dumped, 18" Ballistic Jester's, 37x13.50x18 Nitto Mud Grapplers
Reply With Quote
  #8  
Old 03-11-2012, 09:10 AM
Senior Member
Garage is empty, add now
 
Join Date: Mar 2001
Location: Rochester, NY, USA
Vehicle: 2014 Toyota Tacoma 4x4
Posts: 2,793
Well, it definitely sounds like your IWE's are not locking in then. This post should help just in case.

Everything You Wanted To Know About The IWE System....And Then Some!

If you do need to replace them, make sure you check out the rest of the system at the same time. A vacuum leak or bad solenoid will take out a brand new IWE pretty quick. And if it's any consolation to you, changing out the IWE's is actually pretty simple. My first time out it took me about 45 minutes a side.
__________________


Lights Behind the Grill 2004-2008:http://www.f150online.com/forums/mem...ind-grill.html

Lights Behind the Grill 2009-2011:http://www.f150online.com/forums/ill...11-trucks.html
Reply With Quote
  #9  
Old 03-11-2012, 09:54 AM
Member
Garage is empty, add now
 
Join Date: Feb 2012
Location: Prairieville, LA
Vehicle: 2005 Ford F150
Posts: 66
I picked up a vaccum pump last night from the parts store. I'm about to do a 6" lift, so I'll already have everything torn down, so I figured I'd go ahead and replace em then. But like someone said before, kinda seems impossible that BOTH have stuck in the "open" position.
__________________
2005 FX4 SuperCrew: 3" body lift, 6" SkyJacker suspension lift, BushWacker pocket style flares, Gryphon programmer, K&N intake, FlowMaster 40 series 3" SiSo dumped, 18" Ballistic Jester's, 37x13.50x18 Nitto Mud Grapplers
Reply With Quote
  #10  
Old 03-11-2012, 10:28 AM
Senior Member
Garage is empty, add now
 
Join Date: Dec 2003
Location: Mount Airy,MD
Vehicle: 2009 Ford F150
Posts: 6,550
Quote:
Originally Posted by sethchid View Post
I picked up a vaccum pump last night from the parts store. I'm about to do a 6" lift, so I'll already have everything torn down, so I figured I'd go ahead and replace em then. But like someone said before, kinda seems impossible that BOTH have stuck in the "open" position.
Not if foreign matter or moisture had been sucked into the lines.
Reply With Quote
  #11  
Old 03-11-2012, 05:52 PM
Member
Garage is empty, add now
 
Join Date: Feb 2012
Location: Prairieville, LA
Vehicle: 2005 Ford F150
Posts: 66
Ok, did a little looking this afternoon. I put the truck up on jackstands to get all 4 tires off the ground. Cranked the truck put it in drive, and let the rear tires just spin at idle. Thin I stopped them, put the transmission in N and switched the transfer case into 4HI, and shifted back into drive. Rear tires spin, front driveshaft spins (so transfer case deffinately works), and drivers side front axle spins (open dif), but no front tire movement.

Went ahead and shifted back to 2wd, and killed the truck. With the truck dead, and vacuum hoses removed from IWE, tire still spins freely (like it still has vacuum on it). Put my pump on each IWE, and they both hold about 22#'s. pulled both checks, 1 is bad, will replace both. Hooked 1 side back to the IWE and my pump to the other and cranked the truck. I'm reading on my pump between 20-23#'s on each side.

So where can I find these check valves? And what in the world is up with my stuff!?! Seems like everything is working but the IWE's. And what can spray into the lines to flush them, in case there is some debris in the lines. I'd hate to contaminate the new ones I'll be installing.
__________________
2005 FX4 SuperCrew: 3" body lift, 6" SkyJacker suspension lift, BushWacker pocket style flares, Gryphon programmer, K&N intake, FlowMaster 40 series 3" SiSo dumped, 18" Ballistic Jester's, 37x13.50x18 Nitto Mud Grapplers
Reply With Quote
Old 03-11-2012, 05:52 PM


 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are On
Refbacks are Off


All times are GMT -4. The time now is 02:17 AM.


 
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
Contact Us Advertising Privacy Statement Terms of Service Jobs Forum Text Archives
Emails & Contact Details