Front Hub Problems

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Jan 13, 2018 | 07:06 AM

#16

P.Bronner

Elder User

Joined: Aug 2011

Posts: 858

Likes: 2

From: Chico,CA.

Quote:

Originally Posted by NEO_Mark

Looking at the IWE sticky the worn gears are why I would investigate a stand alone switch to activate the IWE solenoid, or install a separate solenoid and check valve, to engage the hubs before putting it under load.
That's why I speced manual hubs and locked them in before I'm going to need 4x4.
But then I'm a control freak so ....
If when you had it apart and cleaned then lubed the system with 'heavy grease' you screwed yourself, I checked the temp in Va, you're in the teens ~ twentys. I'm guessing it doesn't usually get that cold.

Go do a little homework on the IWE system and then get back to us.

Jan 20, 2018 | 10:00 PM

#17

jerryparks

Thread Starter

Tuned

Joined: May 2014

Posts: 317

Likes: 16

From: Richmond, VA

Pulled the passenger IWE today. Turns out I have no vacuum at either hub. Where should I start looking from there?

Jan 21, 2018 | 08:10 AM

#18

Ted928

Tuned

Joined: Sep 2005

Posts: 331

Likes: 1

From: Charlton, NY

Quote:

Originally Posted by jerryparks

Pulled the passenger IWE today. Turns out I have no vacuum at either hub. Where should I start looking from there?

Firewall behind battery.
Look at the very first sticky; it explains operation and diagnosing.

Jan 22, 2018 | 08:08 AM

#19

jerryparks

Thread Starter

Tuned

Joined: May 2014

Posts: 317

Likes: 16

From: Richmond, VA

I've already replaced the piece on the firewall, it was the first place I looked when I had the issue.

Jan 22, 2018 | 12:41 PM

#20

steve(ill)

Hotshot

Joined: Jul 2005

Posts: 11,931

Likes: 180

motor makes vacuum.... solenoids open and close the vacuum to the IEW.. Do you have vacuum on ONE side of the IWE ? When the solenoid is triggered, do you have vacuum on THE OTHER SIDE ?..... that side goes to the IWE hub... somewhere it is lost and need to check at the solenoids.

Jan 22, 2018 | 06:51 PM

#21

jerryparks

Thread Starter

Tuned

Joined: May 2014

Posts: 317

Likes: 16

From: Richmond, VA

Rented a vacuum gun. Have 27 psi vac up to the actuator on the firewall. 0 at both left and right IWE in 4x2 & 4x4

Jan 22, 2018 | 07:13 PM

#22

Lcredneck

New User

Joined: Jan 2018

Posts: 6

Likes: 0

Quote:

Originally Posted by jerryparks

Rented a vacuum gun. Have 27 psi vac up to the actuator on the firewall. 0 at both left and right IWE in 4x2 & 4x4

Check or replace thehoses to actuators. I am assuming you tested the vacuum line. And not the vent line, correct?

Jan 22, 2018 | 08:21 PM

#23

Ted928

Tuned

Joined: Sep 2005

Posts: 331

Likes: 1

From: Charlton, NY

Quote:

Originally Posted by jerryparks

Rented a vacuum gun. Have 27 psi vac up to the actuator on the firewall. 0 at both left and right IWE in 4x2 & 4x4

Lung power is enough to determine if leak tight.
It sounds like you confirmed that vacuum is making it to the valve.
It sounds like you changed the valve.
The vacuum lines that run down to the IWE often get plugged.
The sticky thread says more than just change the valve.