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Unread 05-21-2013, 06:55 PM   #1
79chiefs
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88 Cherokee Front Axle Info Needed

While removing/installing may starter a few times last week i noticed there wires going into the passenger side of the front axle.



What are they?
Someone explain what axle i have, and just the specs on it please.Also what transfer case i probably have.

The picture of the differential is on the driver side.



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Unread 05-21-2013, 09:35 PM   #2
cruiser54
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Those are vacuum lines, not wires. They're troublesome. Perform the mod outlined in the following link and don't look back.




http://www.cherokeeforum.com/f51/fre...ss-91-a-38629/
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If you own a Renix Jeep, you'll want to check this out. >

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Unread 05-22-2013, 05:07 AM   #3
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What is it for??
If it is 4wd i know i have it because i tried it out in my clay backyard and got rears spinning then put in 4wd and i know i got a front to spin when i floored it in the watery spot.
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Unread 05-22-2013, 05:09 AM   #4
94beachxj
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1988 was a great year for the AMC XJ! Those lines allow your front drive shaft to dissengage so the drive shaft is free when unlocked up front ....! Unlike my 94 part time Mopar tranny. I loved my 88 Pioneer!
jeeper.jpg  
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Unread 05-22-2013, 06:03 AM   #5
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It's a front axle disconnect when in 2wd. A troublesome design that was later ditched because all it added was costs and gave no mileage benefit. The shift fork inside underwent a few design changes as they tried to make the system work better.

There were issues with the vacuum harness getting torn off and people finding themselves in need of 4wd and couldn't engage it. Shift forks bent resulting in the same issue.
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 05-22-2013, 01:38 PM   #6
79chiefs
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Ok, how do you use it, just engage 4wd right?
Also my 4wd light is stuck on after replacing a few vacuum lines/wires/sensors in the engine compartment. could i have done something with vacuum to cause this?
Now heres my main question could the lines affect the vacuum in the engine i.e. i think i have a vacuum leak but cannot find it, and these are in none of the diagrams. It jumps idle when it starts and just sounds high idle and it sometimes comes down and can just move up and down while it is sitting.
I will start googling now that i have some more info.
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Unread 05-22-2013, 02:41 PM   #7
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Ditch all the front axle vacuum stuff and do the mod.
vac-diagram.jpg  
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 05-22-2013, 02:42 PM   #8
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This is the right one. Plug the vacuum source. do the cAD mod. Done.
vacuummap.gif  
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 06-06-2013, 05:47 AM   #9
94beachxj
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Quote:
Originally Posted by cruiser54 View Post
gave no mileage benefit. .
Question ?
Why is my 1994 CHEROKEE'S front diff and drive shaft moving better than the 1988 Pioneer Cherokee not moving?
Now if I am under the thought of motion = resistance=friction.............Is this not costing more wear and tear? And MPG's down the line??

Just using a simple inertia theroy here.

So your saying its better to power TWO drive shafts on a jeep vs one? As far as economy?

Ok.
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Unread 06-06-2013, 05:56 AM   #10
94beachxj
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Quote:
Originally Posted by cruiser54 View Post
There were issues with the vacuum harness getting torn off and people finding themselves in need of 4wd and couldn't engage it. Shift forks bent resulting in the same issue.
There are always lemon cars trucks out there.

My 1988 Cherokee Pioneer never had a prob engaging in 4wd. Now I will say sometimes the driveshaft would not DISSENGAGE till ya ran here a mile or two!
It was a great feature imo . THE Only better feature was the MANUEL locking hubs I had on my 1982 Toyota 4x4 yrs back. To bad these AWD so called 4x4of TODAY are the wave of the future............. Jap crap design.
Peace.
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Unread 06-06-2013, 06:03 AM   #11
cruiser54
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Quote:
Originally Posted by 94beachxj View Post


Question ?
Why is my 1994 CHEROKEE'S front diff and drive shaft moving better than the 1988 Pioneer Cherokee not moving?
Now if I am under the thought of motion = resistance=friction.............Is this not costing more wear and tear? And MPG's down the line??

Just using a simple inertia theroy here.

So your saying its better to power TWO drive shafts on a jeep vs one? As far as economy?

Ok.
Not better to drive 2, but unnecessary to disengage one for no gain and added complexity and cost.
Not to mntion how many times they failed due to pulled off vacuum lines, leaking acuum lines from getting soaked by oil during filter changes, defective shift forks that went through 2 upgrades etc.

AND the best part....Guess when it's gonna fail? Only when you're counting on it working. Ditch the POS.
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
cruiser54 is offline   Reply With Quote Quick reply to this message
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