Vacuum Hub Control Valve?

Hotrodtractor · Nov 10, 2011

I'm curious if anyone knows where the vacuum control valve to run the 4x4 hubs is located and if they have a part number for it. I'm currently putting an '05 Ford front axle under my Dmax and just decided that I needed the vacuum auto hubs to works and don't have a Ford truck handy to look at right now. I know there is a little vacuum pump that is also tied in with the HVAC controls, but there has to be a valve to control the hubs somewhere that can allow for the vacuum to be relieved off the system when the 4x4 disengages.

Thanks!
Jason

Zmann · Nov 10, 2011

it's not so easy
the computer sends a signal to the ESOF valve to engage or disengage the hubs // the duration and HG varies for lock and unlock

Hotrodtractor · Nov 10, 2011

Zmann said:
it's not so easy
the computer sends a signal to the ESOF valve to engage or disengage the hubs // the duration and HG varies for lock and unlock

Interesting.... did not know that. I'll need to go home and look at the lockouts and see if there is a way around that.

Wright337 · Nov 10, 2011

Can you just put manual hubs on the axle?

Hotrodtractor · Nov 10, 2011

Wright337 said:
Can you just put manual hubs on the axle?

I'm using the factory '05 hubs - auto control with the vacuum as well as the ability to manually lock them in - I just want a little bit more control if I can get it. Call it a challenge. LOL

Hotrodtractor · Nov 10, 2011

It seems there are two levels of vacuum needed. A high level to lock in the hub and an intermediate level to unlock the hub. It will be a bit more effort than I originally thought, its still doable.

Wright337 · Nov 10, 2011

Good luck and have fun. Let us know how it turns our. Ford makes it so easy for us to spend money.

Hotrodtractor · Nov 11, 2011

For anyone looking for information on the ESOF system or the PVH valve and pump, I am going to try and put all that I know here in this thread as I acquire it, and then put it into the tech archive.

PVH valve function:

Pin 2 is a constant key on 12vdc
Pin 1 needs to be grounded for 50 seconds to provide a high vacuum source to lock the hubs in.
Pin 3 needs to be grounded for 15 seconds to provide a low vacuum source to unlock the hubs.

PVH valve part number: 7C3Z-9H465A
Vacuum pump part number: 6C3Z-2A451A

Zmann · Nov 11, 2011

Hotrodtractor said:
It seems there are two levels of vacuum needed. A high level to lock in the hub and an intermediate level to unlock the hub. It will be a bit more effort than I originally thought, its still doable.

true and it's also a duration variance for lock unlock
pm me your email I have a pdf for you

EDIT whats the chances Hotrodtractor would post it as I was typing lol

Hotrodtractor · Nov 11, 2011

Zmann said:
true and it's also a duration variance for lock unlock
pm me your email I have a pdf for you

EDIT whats the chances Hotrodtractor would post it as I was typing lol

LOL It happens - I was going to post it last night, but found a little more today while looking - I just need a small electrical circuit that can latch in to ground the one pin for 50 seconds and the other pin for 15 seconds and I'll have functional auto hubs at a flip of a switch in my SAS'd Dmax! Pretty excited for that. The only reason I am wiring it to its own switch instead of tying it into the tcase is because I want 2wd low for backing up a trailer and other such tasks where 2wd low is hand as hell.

EvilTwins · Nov 25, 2011

I don't know if this will help but going to put it up anyway. Im currently having an issue with the 4x4 system and will share my info if it helps.

https://files.me.com/dgmcbride/ch95gl