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Unread 05-13-2013, 02:05 PM   #1
dbeebe4125
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front end

i need an answer please. on my cj7 when i lock my hubs the front end knock and wants to jump even when its not in 4hi or 4lo. it happens when excel or turn right or left

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Unread 05-13-2013, 02:43 PM   #2
Davis77Cj
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are you on pavement?
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Unread 05-13-2013, 02:44 PM   #3
SLO_Ken
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Sounds like you have a locker of some sort in the front differential. Does it do it if you only lock one hub and leave the other free?
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Unread 05-13-2013, 06:17 PM   #4
keith460
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First thing I would check is the condition of the axle U-joints right at the steering knuckles. They will make snap, crackle and popping noises when they are worn or seized.

Knuckle U-joint (ignore the circled item)
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Unread 05-13-2013, 07:11 PM   #5
82JeepCJ7
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Its amazing what happens when you put a vehicle in 4wd (even locking just the hubs). So many people think something is wrong because it binds, bucks, etc when on pavement etc.
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Unread 05-13-2013, 08:09 PM   #6
jeepdaddy2000
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A vehicle with the hubs locked in, but not engaged in four wheel drive at the t case should not bind or buck unless there is a locker, LS, or a problem with the front end. Remember, virtually all modern 4X4's run with the front locked permanently.
As stated above, I would check the U joints. If all is well, then a move to the diff is in order.
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Unread 05-13-2013, 08:19 PM   #7
skizriz
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Quote:
Originally Posted by jeepdaddy2000
A vehicle with the hubs locked in, but not engaged in four wheel drive at the t case should not bind or buck unless there is a locker, LS, or a problem with the front end. Remember, virtually all modern 4X4's run with the front locked permanently.
As stated above, I would check the U joints. If all is well, then a move to the diff is in order.
Yep. Up here in the snow belt we lock in the hubs all winter. Saves the trouble of getting out in the cold when you need 4wd.

Could also be a t-case stuck in 4wd.


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Unread 05-13-2013, 09:11 PM   #8
titomars
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Assuming it is all stock the first place I would look is the axle shaft u-joints. If one or both are bad they will start binding and bucking the moment you turn the wheel on pavement. The only other cause that I can think of would be a locker or welded spiders.
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