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4 HI disengage

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Old 10-08-2012, 08:13 AM
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I'll try it when I leave work.
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Old 10-08-2012, 08:40 AM
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Originally Posted by cruiser54
Probably. But driving in a straight line in 4H, letting off the gas, throwing the lever to 2H and then tapping the gas and letting off again should disengage it.

One thing that will aggravate the situation is different size tires from front to rear or unmaintained tire pressures.
Just for completeness the reason this matters is difference in wheel rotation rates will cause components to bind internally. A big no-no is driving on dry pavement in 4H (part time). Pretty much guarantees this will occur. I believe my 1999's manual says that if you do run on pavement for a while and binding occurs, then pull off to a gravel shoulder and toss it into reverse for a bit.

In normal driving with 4H in the winter I've never had any problems engaging or disengaging. Slush and snow must be deep enough to allow for slip
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Old 10-08-2012, 11:07 AM
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Originally Posted by cruiser54

Probably. But driving in a straight line in 4H, letting off the gas, throwing the lever to 2H and then tapping the gas and letting off again should disengage it.

One thing that will aggravate the situation is different size tires from front to rear or unmaintained tire pressures.
This worked. I guess I wasn't doing it right before.
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Old 10-08-2012, 11:11 AM
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Originally Posted by cruiser54
driving in a straight line in 4H, letting off the gas, throwing the lever to 2H and then tapping the gas and letting off again should disengage it.
this^
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Old 10-08-2012, 01:46 PM
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Originally Posted by 2doors

That's what I was thinking.
That's weird my 92 has vacum on the front diff
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Old 10-08-2012, 02:44 PM
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Is this for the NP-231, NP-242 OR both?
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Old 10-08-2012, 04:46 PM
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Originally Posted by Bbasso
Is this for the NP-231, NP-242 OR both?
I don't know I got a 231 and my friend has a 242 so I know both but its weird they said the 91 and newer and I have a 92 with vacum disconnect
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Old 10-08-2012, 04:54 PM
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Originally Posted by Bbasso
Is this for the NP-231, NP-242 OR both?
The shifting instructions are for both.
242 never came with a vacuum disconnect front axle aka CAD. Only the 231 did and only through part of 1991.
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Old 10-08-2012, 05:56 PM
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Originally Posted by cruiser54

The shifting instructions are for both.
242 never came with a vacuum disconnect front axle aka CAD. Only the 231 did and only through part of 1991.
My jeep was made in april of 92 and I have vacum disconnect
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Old 10-08-2012, 06:37 PM
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Originally Posted by 92 2dr
My jeep was made in april of 92 and I have vacum disconnect
That's weird.
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Old 10-08-2012, 06:38 PM
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Originally Posted by 92 2dr

My jeep was made in april of 92 and I have vacum disconnect
that's not right. something is off there
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Old 10-08-2012, 06:42 PM
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Originally Posted by N20jeep
that's not right. something is off there
I agree.
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Old 10-08-2012, 10:22 PM
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Originally Posted by 92 2dr
My jeep was made in april of 92 and I have vacum disconnect
Is it functional? Me wonders if someone swapped it in, possibly the old one had some problem or they were going to do a cable disco?
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Old 10-08-2012, 10:47 PM
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Sure it's not just the vent hose coming off the diff?
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Old 10-08-2012, 11:17 PM
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Originally Posted by 2doors
Sure it's not just the vent hose coming off the diff?
I'm postive I have a hose running to the motor
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