'06 auto 4x4 not working
Thread Starter
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New User
Joined: Mar 2008
Posts: 12
Likes: 0
From: Alberta
'06 auto 4x4 not working
I recently just purchased this truck from a co-worker and he'd had the seals replaced at a dealership just off of warrenty. We recently just had a wicked snowstorm and the auto 4x4 doesn't work. If I manually lock the hubs it works OK. I can live with this as I seldomly use the four wheel drive, but as it was an extra expense as an option, shouldn't it work correctly? Just wondering if any one else has experienced the same problems and what they've done to rectify the problem
Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
What seals were replaced? The wheel bearings are made in one assembly...unit bearings.
Things that come to mind:
(1) Vacuum lines not re-connected
(2) Vacuum solenoid not getting signal
(3) Locking hubs are dirty or damaged
Really need to know what seals were replaced.
Things that come to mind:
(1) Vacuum lines not re-connected
(2) Vacuum solenoid not getting signal
(3) Locking hubs are dirty or damaged
Really need to know what seals were replaced.
Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 6
From: Albuquerque
Here is a GREAT tech write up (see link). The O-ring seal should be replaced anytime the hub is removed...according to the article.
Welcome to guzzle's 4x4 Autolock Hub Lubrication Maintenance Web Page
biz
Welcome to guzzle's 4x4 Autolock Hub Lubrication Maintenance Web Page
biz
Thread Starter
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New User
Joined: Mar 2008
Posts: 12
Likes: 0
From: Alberta
Thanks for the info. I will take it apart to see if the o-ring seal is damaged. Like I stated earlier it was repaired at a dealership and had to be fixed again shortly after because it was damaged upon installation. My best guess is that it was improperly installed and may be damaged causing the hubs not to engage.
If it were a vaccuum leak, would it be noticable by hearing it leak? Where's the best place to check for vaccuum?
If it were a vaccuum leak, would it be noticable by hearing it leak? Where's the best place to check for vaccuum?
Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 6
From: Albuquerque
Unless super-sonic hearing...I don't think you can hear it. The best place to check for vacuum is on the tube at the axle end. Also check the nipple on the axle (where the tube goes) for any obstruction.
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