name of this part
Thread Starter
Member
Joined: Jun 2012
Posts: 158
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From: arizona
Year: 1991
Model: Cherokee
Engine: 4.0 i6
name of this part
My wife has an 89 xj and it has the 3 vacuum lines that go to the front axle. Well those 3 lines are supposed to go to a little square piece before going to the disc on the axle. What is the square piece called? It's missing and I'm trying to get all the vacuum lines sorted out so it can pass emissions
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Not familiar with this square piece but the vacuum-operated Central Axle Disconnect is unreliable and can be eliminated. You can also eliminate the vacuum lines that used to feed it, thus resolving your issue. No impact to emissions or testing.
https://www.cherokeeforum.com/f51/free-d30-cad-bypass-91-a-38629/
https://www.cherokeeforum.com/f51/free-d30-cad-bypass-91-a-38629/
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CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Possibly the "block" you are referring to is a rubber junction deal. Two of the three lines go into this little rubber "block", that fits on the nipples on the disco. It's "stepped", since one nipple is farther in than the other. Btw they tend to fall off, is why I have a zip-tie, loosely holding mine on. (and a common reason they fail, causing some to, "throw the baby out with the bathwater".
Junk yard idem. I suppose without it you could rout the lines directly to the correct nipples. Just be sure they are secure so any limb or something can't knock them off.
Would be the black and yellow in this diagram. (I think).
Last edited by DFlintstone; Mar 18, 2014 at 03:58 PM.
Thread Starter
Member
Joined: Jun 2012
Posts: 158
Likes: 0
From: arizona
Year: 1991
Model: Cherokee
Engine: 4.0 i6
There's two "camps" here. Some prefer to eliminate there vac disco, (you can), and some prefer to keep it. (mine works fine as designed).
Possibly the "block" you are referring to is a rubber junction deal. Two of the three lines go into this little rubber "block", that fits on the nipples on the disco. It's "stepped", since one nipple is farther in than the other. Btw they tend to fall off, is why I have a zip-tie, loosely holding mine on. (and a common reason they fail, causing some to, "throw the baby out with the bathwater".
Junk yard idem. I suppose without it you could rout the lines directly to the correct nipples. Just be sure they are secure so any limb or something can't knock them off.
Would be the black and yellow in this diagram. (I think).
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
The other camp here:
Ditch that troublesome set-up. They failed when new, not only due to vacuum issues, but shift fork design.
As Service Manager at a Jeep dealership in Prescott, we had them lined up out front along with pissed off customers, every snow day.
https://www.cherokeeforum.com/f51/fr...ss-91-a-38629/
Ditch that troublesome set-up. They failed when new, not only due to vacuum issues, but shift fork design.
As Service Manager at a Jeep dealership in Prescott, we had them lined up out front along with pissed off customers, every snow day.
https://www.cherokeeforum.com/f51/fr...ss-91-a-38629/
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
The other camp here:
Ditch that troublesome set-up. They failed when new, not only due to vacuum issues, but shift fork design.
As Service Manager at a Jeep dealership in Prescott, we had them lined up out front along with pissed off customers, every snow day.
https://www.cherokeeforum.com/f51/fr...ss-91-a-38629/
Ditch that troublesome set-up. They failed when new, not only due to vacuum issues, but shift fork design.
As Service Manager at a Jeep dealership in Prescott, we had them lined up out front along with pissed off customers, every snow day.
https://www.cherokeeforum.com/f51/fr...ss-91-a-38629/