Part Time 4wd not working

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Dec 12, 2010 | 11:28 PM

#16

XJ4life92

Senior Member

Joined: Mar 2009

Posts: 818

Likes: 0

From: Levittown P.A.

Year: 1992

Model: Cherokee

Engine: 4.0L H/O

did 1990 cherokees have vacuum disconnect front axles? that would be something to check out.

oops my bad...i didnt read fully

Last edited by XJ4life92; Dec 12, 2010 at 11:29 PM. Reason: didnt read, repeat

Dec 13, 2010 | 05:32 PM

#17

DTibbetts

Thread Starter

Newbie

Joined: Dec 2010

Posts: 9

Likes: 1

From: maine

Year: 2007

Model: Grand Cherokee (WK)

Engine: 3.7L

Quote:

Originally Posted by OverEasy

Yeah, as stated. You really need to pull the cover and see whats going on in that front end, if anything at all. Hate to assume but if there was NO retention... Not good. You may be missing some parts.

Please keep us posted when/ if diff cover is pulled.

I pulled the cover tonight, other then real bad fluid the only thing missing is a pin in one of the gears

Dec 13, 2010 | 06:06 PM

#18

billulsund

Senior Member

Joined: Apr 2010

Posts: 615

Likes: 0

From: Bonney Lake, WA

Year: 1989

Model: Cherokee

Engine: 4.0 IL6

A pin in one of the gears? Like the crosspin that goes through the spider gears? That could be your problem, but seems unlikely. Can you be more specific, or take a picture and post it. If that is not it I am thinking it could be a broken shift fork. If the vacum disconnect is not engaged then all the power will go to the disconnected shaft and your front tires will not get any power. If the gears look good and you can turn the yoke and see the carrier spinning but the tires are not moving then it is most likely that the vacum disconnect is broken.

Last edited by billulsund; Dec 13, 2010 at 06:09 PM.

Dec 13, 2010 | 07:06 PM

#19

OverEasy

Senior Member

Joined: Nov 2010

Posts: 863

Likes: 2

From: Lynchburg, Va.

Year: 1998

Model: Grand Cherokee

Engine: 5.2/318 MSD Electronic Upgrades

Quote:

Originally Posted by DTibbetts

I pulled the cover tonight, other then real bad fluid the only thing missing is a pin in one of the gears

Crosspin . . . ?

Edit: N/M See below. . . LOL

Quote:

Originally Posted by billulsund

As far as a broken shift fork, how possible could that be without KNOWING thats what it is? As in, would it maybe make you look to other things first? Learning a little here myself.