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Junior Member
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Discussion Starter #1
Got a question for you fellers:


I have a 2008 F350 4wd, AT, manual lock hubs, manual 4wd shifter.


Call me old school, but growing up I had 4wd rice rockets with the manual hubs. I like to know if its locked or not instead of a light on the dash telling me.

So I thought anyway. Here's the story:

After dropping off couple of guys at there deer stands I encountered some soft ground and my worn out tires caked up and started to spin- of course i lock the hubs, drop in 4wd high and nothing..... back tires spin......drop to 4wd low and same thing...... well I'm 2 1/2 miles from my deer stand so I started the hike- no big deal isn't like the trucks going anywhere.

elmerfudd

After the hunt (not seeing anything) I get back to truck and notice the front tires had not been spinning. did finally manage to rock the beast out in 2 1/16 drive- I say this because it appeared the front tires were partially engaging- more it almost seemed in reverse or when rocking the truck.

This happened several more times during the day.

Now for the stats and questions:

2wd in park- front drive shaft turns, passenger side yolk turns, drivers side does not. Why doesn't the drivers side turn?

4wd in park- front drive shaft is engaged- it won't budge- I know transfer case is not the issue- whew!!

Haven't tried this, but I am getting ready to walk out side:

If the hubs are locked and its in 2wd the front shaft should be locked correct?
if the shaft still turns it means the hubs are not engaging and thats the issue.

How hard are those to tackle- hopefully its as simple as removing some screws and driving the pin out, greasing and reassemble?

Still leaves the question as to why the drivers side yolk isn't turning, unless its limited slip and i didn't turn the shaft enough.


Sorry for the long post and many thanks in advance for assistance.

Chris
 

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Junior Member
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186 Posts
It sounds like the hubs are not engaging properly. The pulse-lock hubs require some wheel movement to engage, and use vacuum connections which can be a bit vulnerable to damage from road debries. You may not have had the wheels turning enough to engage the hubs if you didn't switch to 4wd before getting stuck. You can manually lock the hubs in those cases by turning the knobs on the hubs from auto to lock.
 

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Discussion Starter #3
Thanks WP, but I have the manual hubs, with the manual transfer case. After getting unstuck I did leave it in 4wd thinking the same thing, but that was not the case.
 

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Well, if you have manual hubs it sounds like at least one is broken. I believe they come apart fairly easily and aren't that expensive to replace.
 

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Discussion Starter #5
ok yes I just tried locking hubs and turning front drive shaft. Figured if they were locked in it should not turn. They do turn so I guess either the spring or something is broken.

I did talk the mechanic that did some work for me and he said I could take it to his house this weekend and we could work on it. I have messed with them so I would rather look over an experts shoulders and learn.


Chris
 

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Discussion Starter #6
The passenger side hub was fried. About every 3rd tooth was busted. $150 later and I'm now up and running.
 

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Discussion Starter #8
Back to the SOS. Both hubs replaced and still not working. Sounds like its popping out of gear in transfer case. Anyone else heard of this issue?
 

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Junior Member
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I haven't heard of that issue, but it makes me think of possibilities like the transfer case shifter link needing adjustment, or body and/or trans mounts that are worn out and letting things shift too much under load.
 

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Discussion Starter #10
I haven't heard of that issue, but it makes me think of possibilities like the transfer case shifter link needing adjustment, or body and/or trans mounts that are worn out and letting things shift too much under load.
Great idea. Thanks. Sounds like you have some experience with this problem?


Chris
 

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No experience with it, just a couple thoughts on possibilities that would be preferable and easier to check than an internal transfer case problem.
 

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TDG Mafia Member #25
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Wow, that is surprising for sure with the normally rock solid manual systems. Never have heard or seen anything like that.

Adrianspeeder
 

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Discussion Starter #13
Issue still lingers, of course I haven't messed with it much. Guess its not self healing. Hunting season is not too far away so I thought I would revive this post and see if anyone else has ideas.


Thanks
chris
 

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Discussion Starter #14
Bringing this post back up. I had it at repair shop for service and asked them to check the 4wd system because I had problems lingering. They said it was fine....Tried it the other day and same thing is happening again. An interesting site was the back wheels turning and also the front driveshaft turning, but not the u joints at the wheels. So is this in the front axle or the front hubs? The hubs were replaced.


Thanks

Chris
 

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Member
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You might want to pull the front diff cover and check your gears. With hubs unlocked but transfer case in 4H does the front drive shaft spin by hand? If so that would be a transfer case issue. Are you absolutely positive your turning both hubs in lock?
 

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Discussion Starter #16
Thanks for the fast response. Yes I am 100% positive I have it turned to lock. But just craps and giggles, I turned it to unlock and then tried it. Then locked back. Also tapped around the hub just in case it was hanging up a little. Hey, what can I say, I'm in construction always have a hammer and if something isn't working just beat on it with a hammer and it starts to work....hmmm wonder if I could do that with some of my subcontractors. Just kidding.
 
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