4 HI disengage

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Oct 8, 2012 | 08:13 AM

#16

2doors

Thread Starter

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Joined: Jul 2012

Posts: 226

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From: Louisville, KY

Year: 94

Model: Cherokee

Engine: 4.0 I6

I'll try it when I leave work.

Oct 8, 2012 | 08:40 AM

#17

salad

Herp Derp Jerp

Joined: Nov 2011

Posts: 18,251

Likes: 17

From: Parham, ON

Year: 1999

Model: Cherokee

Engine: 4.0L OBD-II

Quote:

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

Oct 8, 2012 | 11:07 AM

#18

2doors

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Joined: Jul 2012

Posts: 226

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From: Louisville, KY

Year: 94

Model: Cherokee

Engine: 4.0 I6

Quote:

Originally Posted by cruiser54

This worked. I guess I wasn't doing it right before.

Oct 8, 2012 | 11:11 AM

#19

xjheep92

CF Veteran

Joined: Nov 2008

Posts: 1,021

Likes: 3

From: mass

Year: 1992

Model: Cherokee

Engine: 4.0 high output

Quote:

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^

Oct 8, 2012 | 01:46 PM

#20

92 2dr

Member

Joined: Feb 2012

Posts: 220

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From: Albany, Oregon

Year: 1992

Model: Cherokee

Engine: 6 cyl 4.0L high output

Quote:

Originally Posted by 2doors

That's what I was thinking.

That's weird my 92 has vacum on the front diff

Oct 8, 2012 | 02:44 PM

#21

Bbasso

Senior Member

Joined: Jun 2012

Posts: 868

Likes: 1

From: SC

Year: 1999

Model: Cherokee

Engine: 4.0

Is this for the NP-231, NP-242 OR both?

Oct 8, 2012 | 04:46 PM

#22

92 2dr

Member

Joined: Feb 2012

Posts: 220

Likes: 0

From: Albany, Oregon

Year: 1992

Model: Cherokee

Engine: 6 cyl 4.0L high output

Quote:

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

Oct 8, 2012 | 04:54 PM

#23

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

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.

Oct 8, 2012 | 05:56 PM

#24

92 2dr

Member

Joined: Feb 2012

Posts: 220

Likes: 0

From: Albany, Oregon

Year: 1992

Model: Cherokee

Engine: 6 cyl 4.0L high output

Quote:

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

Oct 8, 2012 | 06:37 PM

#25

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by 92 2dr

My jeep was made in april of 92 and I have vacum disconnect

That's weird.

Oct 8, 2012 | 06:38 PM

#26

N20jeep

CF Veteran

Joined: Mar 2010

Posts: 6,685

Likes: 6

From: Jacksonville, FL

Year: 92

Model: Cherokee

Engine: 4.0

Quote:

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

Oct 8, 2012 | 06:42 PM

#27

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by N20jeep

that's not right. something is off there

I agree.

Oct 8, 2012 | 10:22 PM

#28

salad

Herp Derp Jerp

Joined: Nov 2011

Posts: 18,251

Likes: 17

From: Parham, ON

Year: 1999

Model: Cherokee

Engine: 4.0L OBD-II

Quote:

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?

Oct 8, 2012 | 10:47 PM

#29

2doors

Thread Starter

Member

Joined: Jul 2012

Posts: 226

Likes: 0

From: Louisville, KY

Year: 94

Model: Cherokee

Engine: 4.0 I6

Sure it's not just the vent hose coming off the diff?

Oct 8, 2012 | 11:17 PM

#30

92 2dr

Member

Joined: Feb 2012

Posts: 220

Likes: 0

From: Albany, Oregon

Year: 1992

Model: Cherokee

Engine: 6 cyl 4.0L high output

Quote:

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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