autolock hub not working

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Jul 24, 2017 | 08:31 AM

#16

ithaca1230

Thread Starter

Laughing Gas

Joined: Jul 2012

Posts: 889

Likes: 1

From: Ithaca

I'm gonna mess with this next couple nights. 4wd works if you lock hubs manually. When I had it on the lift they engaged. You could hear them click. When its on the ground they do not. Not sure whats going on. It was doing this about a year ago. It has always worked until then.

Jul 24, 2017 | 09:06 AM

#17

thor363

Fleet Mechanic

Joined: May 2017

Posts: 1,314

Likes: 103

From: TN

Did you replace the inner seal(s) also, not just the outer o-ring seal? Check vacuum at either side and see if you have vacuum generated properly. If not... vacuum pump or solenoid or lines. If so... check inner seals too.

Jul 24, 2017 | 09:27 AM

#18

thor363

Fleet Mechanic

Joined: May 2017

Posts: 1,314

Likes: 103

From: TN

Might need a cheap cigar to find it lol

Jul 24, 2017 | 02:51 PM

#19

ithaca1230

Thread Starter

Laughing Gas

Joined: Jul 2012

Posts: 889

Likes: 1

From: Ithaca

I replaced al the seals. I smoke cheap cigars all day long will have to mess with it next few nights. I have to replace a oil hose from BPD remote cooler then mess with this again. Thanks!

Sep 6, 2017 | 07:59 AM

#20

ithaca1230

Thread Starter

Laughing Gas

Joined: Jul 2012

Posts: 889

Likes: 1

From: Ithaca

Just a follow up. I tested the vacuum hoses and they were fine. Gave it to mechanic and he replaced a solenoid. Auto Hubs work like new!

Sep 6, 2017 | 08:17 AM

#21

rock2610d

Fleet Mechanic

Joined: Mar 2013

Posts: 1,576

Likes: 41

From: Wyoming

That's great.
Keep an eye on your front though, I bought a cheap solonoid replacement and it worked great. After 2 yrs it allow 15 in hg to lock hubs in but only puts out 5 in hg for the 30 second unlock pulse.

My hubs need about 7 in hg to ratchet to unlock mode. I'm getting a oem unit this time.

Sep 6, 2017 | 09:16 AM

#22

pgguru

Tuned

Joined: Nov 2013

Posts: 255

Likes: 3

From: Hamilton Ontario

Quote:

Originally Posted by chetspencer

Working Auto locking hubs on a Superduty / Excursion = Unicorn. Does anyone know if there's an aftermarket alternative Auto Locking Hubs. I don't mind getting out to lock my hubs but the wheel caps have to be removed to do so.

I have two sets one the Auto lock works but they are seized and the manuals don't.. the other the manuals work but not the Auto "Know" they are locked if I get stuck.

Here is something I learned the Hard way.. If you can not move at all when you are stuck your fronts will not engage until you go about a half wheel turn.
I looked like an idiot last spring with my back end stuck on a Ice/snow bank in a parking lot and the fronts not engaging.. had to get a dodge give me a tug to get off

the snow bank.