Front drive shaft not disengaging - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 03-09-2011, 10:54 AM Thread Starter
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Front drive shaft not disengaging

New to this forum.

Before making this post I have reviewed post and problems looking for a solution before making this post. The answer may be here I just haven't seen it yet.

2002 F250 4x4, auto trans.

The front drive shaft isn't disengaging back into the two wheel drive mode.

I've checked the switch. and the motor and both are functioning.

Checked motor by removing and using a 12 V source.motor functioned in both directions. Greased and reinstalled and checked switch and motor makes a noise as if functioning properly.

Front drive shaft is staying engaged.

Any Suggestions??????
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post #2 of 8 Old 03-09-2011, 11:22 AM
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Sounds like a hub is still locked.
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post #3 of 8 Old 03-09-2011, 11:31 AM
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ensure that both front hubs are unlocked.

Mine will stay in 4wd until i put it in reverse and back up a few feet


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post #4 of 8 Old 03-09-2011, 11:38 AM
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Sometimes my hubs stick too. Locking them manually then unlocking them and maybe turning the driveshaft a little always works to unstick mine.
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post #5 of 8 Old 03-09-2011, 11:49 AM
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electronic is great, manual is dependable

I have basically the same issue with my 02, ive noticed, especially coming out of low, facing downhill on a slight slope, and slipping it into N before stopping, then moving the selector back to 2wd, it works smoothly everytime...otherwise....from 4wd low, its a PITA to get it out of 4 low.....

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post #6 of 8 Old 03-10-2011, 08:17 AM Thread Starter
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Thanks for the suggestions.

What I have done is remove the lockouts on one side at a time to determine if a hub was sticking. Sure enough the left one was. It wouldn't unlock when reinserting the lockout so using the lockout form opposite side I was able to unlock it. After several functional test I reinserted the original lockouts into the side they were on and it became functional while wheels are off the ground. A couple times the left front failed until repeated manual locking in & out was performed then it eventually unlocked.

At this point it's unlocked but I haven't determines if the problem is in the lockout itself or the hub. Not sure how to determine this.

The auto position of the lockouts do not work so I suspect it's a vacuum problem.

After reading several post here there seems to be some consensus that warn lock out replacements do not always function properly on this application.

Any further suggestions would be helpful.

Thanks.
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post #7 of 8 Old 12-05-2011, 12:16 PM
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I am having the same problem as above. Both hubs stick have I cant get them to unlock. My question is: Does anybody know why do these hubs do this? Perhaps a spring is weak or maybe they just need to be serviced?
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post #8 of 8 Old 12-05-2011, 12:51 PM
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Just like everything else on your truck, these things need maintenance too!

Welcome to guzzle's 4x4 Autolock Hub Lubrication Maintenance Web Page
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