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Another 4wd problem...

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Old Dec 21, 2010 | 07:37 AM
  #1  
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Another 4wd problem...

I have an 02 with 5.4l. It has FWD shift on the fly dash board switch. I replaced the hubs with Warn manual locking hubs last year and used them last winter with no issues.

Last night with first snow I attempted to use the 4wd. The dash light came on, but no 4wd. Then I started getting 4wd intermittently. It would 'clunk' in and then slip out immediately... so basically unuseable. I tried high and low range and its the same deal.

Where do I start looking???

Thanks
 
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Old Dec 21, 2010 | 07:51 AM
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From: North Carolina
How do you know it was not engaging, what were the symptoms? Does the 4x4 light ever go out?

This sounds like a hub problem... dis-engage the hubs and try to rotate the axles by turning the knuckles by hand. They should rotate freely. Then engage the hubs and try to rotate the axles again. You should not be able to rotate them (or after a rotation or two they should "clunk" in place and then you should not be able to rotate them). If it doesnt lock the axle, then there is something wrong with the hub.

Pull the bad one out and clean and lube it. Actually do both of them for good measure... It sounds like one of them is only slightly engaging. Maybe water got inside one somehow and frose it up or whatever.

If that doesn't help, then report back...
 
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Old Dec 21, 2010 | 08:07 AM
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The Warn Manual hubs are fairly straight forward... arn't they? I had them in the lock position. I will try to rotate the axles as you said but I'm 75% sure its not the hubs... we'll see.

Thanks for the response
 
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Old Dec 21, 2010 | 08:27 AM
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GUNNERDOG
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From: North Carolina
Yep, they are straight forward, but not maintenance free...

They use a relatively weak spring to engage the splines... if there is some grit or ice in there it can prevent the splines from fully engaging. It is a quick, easy and cheap test anyway.

Does your 4x4 light stay on while it is "clunking" in and out?
 
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Old Dec 21, 2010 | 08:42 AM
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Yes the light stays on.
 
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Old Dec 21, 2010 | 09:32 AM
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Gunnerdog nailed it. Went out during coffee break and tried turning the front axles. The drivers side Warn Hub is not enguaged. Looks like some maint is in order.

To be honest, with the way everyone on this site raves about Warns, I really didn't even consider them as the issue. I even have the high-dollar lifetime warantee grade hubs.

Who'd-a-thunk-it?
 
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