Surprise surprise, my ESOF doesnt engage the hubs. I have switched out the vacuum lines in the wheel wells and nothing changed. Still getting defroster when switching to 4x4. Where do I go next?

 

Check under the glove box. There is a piece that has 3 vac lines that come into it. I know occasionally on my truck a passenger will kick it and disconnect one and not even know it. Its also possible that you have a bad o-ring on one of the hubs, or a unit bearing that is starting to go bad and is leaking vacuum.

 

Well I have a big kick plate under the glovebox, so its not that. Guess I'll add the hub teardown to my to do list

 

Check out Guzzle's website. Under Maintenance, there is a page for the hubs:

Welcome to guzzle's Ford PSD Web Pages

 

before you tear down the hub you could throw a mityvac on each one to see if that is where the problem is.

 

I'd still take a quick look. Mine is tucked way up in there, and it still got disconnected....

 

I have a brake bleed hand pump I assume that would work. Do I just hook it to the hub and pump away?

But that involves 4 of those annoying plastic screw things. Haha I'll get under there and take a look.

 

[QUOTE=TreySpooner65;10429257]I have a brake bleed hand pump I assume that would work. Do I just hook it to the hub and pump away?



Yup, if it holds no problem, if not it may be the o rings or the hub.

 

Well lets see if that yields any info..

 

I was able to get both hubs to engage with the hand held pump (good tip clem1226!!) So I hooked the pump to the other end of the hose (Now testing everything beyond the wheel well) and neither side would hold vacuum.

Also nate, took that plate off but couldnt find any vacuum hoses back there.

 

What 4 plastic screw things???? Under the glove box...passenger side...not the dash on the drivers side.

 

Mines a little different. Heres a pic of the thing I was talking about. It completely covers everything under there.



And here is a pic of the hoses. I cant reach the part you have in your hand with out pulling the glovebox out, which I will do in a min..



EDIT: I pulled the glovebox.. The piece you showed is intact.

 

Weird....never seen that kickplate before. Cool deal...well next step would be to start at the vacuum pump and work out from there.

 

My guess is it was added to prevent antsy passangers from screwing stuff up

Is the vacuum pump the motor thing on the passenger side near the firewall?

 

TreySpooner when I had a problem with my ESOF I found that the electrical connection "Pig tail" that connected directly to the transfer motor. That little motor that shifts the transfer case into 4 x4 was actually loose. I need to replace it just haven't gotten to it yet. It is going to be a must before hunting season gets here. Hope that helps a little.