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post #1 of 14 Old 03-20-2009, 05:25 PM Thread Starter
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front axle joints question, help

On a 02 4wd, the shift button is on the dash not manual for 4wd.
Are the front U joints supposedtospin when the truck is in 2wd and the vehicle is being driven? for some reason i was thinking they did not spin while moving unless you were in 4wd? I am getting u joint noise at full turns or close to full turns when trying to park or something. Its the u joints. But they are spinnin gup front all the time.
is this normal?
thx
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post #2 of 14 Old 03-20-2009, 05:28 PM
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I thought that if the hub was locked, it will spin. But if in auto, or unlocked in an aftermarket hub, it should not rotate. Someone else should chime in with more info.

2005 F250 Lariat FX4 Supercab Longbed
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post #3 of 14 Old 03-20-2009, 05:40 PM Thread Starter
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stock hub, but its hard to turn off and on. I need to use large pliers to turn em?
if correct that they dont spin, i am glad. Would wrather figure out why hubs are locked?
It does not feel like the 4wd is still on if it matters. But hubs are definately turning....
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post #4 of 14 Old 03-20-2009, 06:13 PM
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My hubs are stiff also, I have to work them for a minute before they unlock. I think they will free spin if everything is working properly, mine seem to.

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post #5 of 14 Old 03-20-2009, 06:42 PM
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due to the mechanical drag on everything you may notice the shafts rotating with the wheels. try to spin the shafts by hand and see if they are actually locked in.

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post #6 of 14 Old 03-20-2009, 06:52 PM
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I have the exact same problem in my 01. Just recently I hear u-joint popping on sharp corners and my hub on that side I can't turn by hand and I can see the o-ring coming out. I was going to change the hubs to after market any suggestions on that?
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post #7 of 14 Old 03-20-2009, 07:03 PM Thread Starter
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how do i unlock the hub then?
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post #8 of 14 Old 03-21-2009, 02:06 AM
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If you jack up one side, spin the tire. If the axle spins when in 2wd the lockout is hanging up. On the auto hubs when set to auto they should disengage, when turned to lock they are locked. Its also possible the axle ujoint is tight causing the lockout to hang up. Ive replaced several like that.

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post #9 of 14 Old 03-21-2009, 03:45 AM Thread Starter
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its a manual hub, they turn real tight. I am willing to bet the hub is not allowing it to turn off somehow. How would i unlock that? goint out this am and going to try.
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post #10 of 14 Old 03-21-2009, 11:27 AM
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If the knob on the lockout is tight, Ive sprayed it with PB blaster or WD 40 to loosen them up. Their made out of aluminum so they will corode and be hard to turn.

99 F350 4x4 dually
7.3 w/K&N af
4" exh into 6" Aussies stacks
4"lift &35" tires
CC mod HP crossover line
Beans stage II 120hp injectors
D66 turbo
ITP regulated return
reburn on TS= 25,high idle,60,100,120,140hp
updated ecm (2000 model)
Dyno#'s 360hp and 965 ft lbs trq
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