Front hub problems....Need help

[King Rancher_27]

So the other day I was trying to pull out a stump and my 4wheel drive didnt work until i locked my hubs. I tried putting in 4wheel with hubs and auto drove quite a few feet forward and reverse and still didnt lock in. My ac is fine it dont blow through the defrost when i put it in 4wheel drive. I even pulled the vacuum lines off the hubs and tried the 4wheel switch the ac still blows out of the vents not the defrost so i dont think its a vacuum problem. Any help would be great!!! Thanks in advance

[ZMANN]

pulling the vac line didn't do anything since the command to lock unlock only last a few seconds

did your hubs work ok manually switched to 4x4 ?

did you dash light illuminate 4x4?

[King Rancher_27]

Originally Posted by ZMANN

pulling the vac line didn't do anything since the command to lock unlock only last a few seconds

did your hubs work ok manually switched to 4x4 ?

did you dash light illuminate 4x4?

Thanks for the reply, yes manually everything was fine 4x4 light comes on 4wheel drive works

[King Rancher_27]

Bumping this up


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[KOOOPSD]

I have the same problem in my 06

[King Rancher_27]

Yeah I've been looking for solutions for the fix. I even changed out my hubs from my buddy's truck that 4wheel was working in auto. Still have the same issue and his works fine in auto with my old hubs. I don't know what to try next. I don't want to take it to a dealer unless I absolutely have to.


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[King Rancher_27]

Does anybody have a solution?


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[ZMANN]

sorry for the delay

you likely have a problem with the ESOF solenoid, a vac seal in the front axle or a broken vac line

[ZMANN]

if you have a vac tester like a mighty vac that would be the best to isolate the issue

start by applying vac to each hub by using the OEM splice in the vac tube near the knuckles

[King Rancher_27]

Ok thanks for the info. I'll give the vacuum pump a try. With the vacuum pump I should hear the hubs lock in right? Just a little more info on my troubleshooting. I turn the key to run position (truck not running) and shift the ESOF to 4wheel hi and low and you can hear the tcase making noise. So by that I'm assuming my ESOF solenoid is working and also dash light comes on as well.


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