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Topic: Transfer Case Question

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OtsiderCherokee
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Transfer Case Question
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Here is what I have.  I have a 1989 Cherokee with Command-Trac and a 5-speed, and I also have a 1989 Cherokee Wagoneer with Selec-Trac and an automatic transmission that I just bought.  The engine in the Cherokee probably has a broken piston and it was easier at the moment to buy another one, so along came the wagoneer.

The question is:

Will the Command-Trac transfer case go in place of a Selec-Trac?  The Selec-Trac has some seriously bad noises coming out of it and does not turn the front drive shaft, and I would like to swap transfer cases but do not know what I am up against....  The front diff on the Wagoneer is different from my Cherokee in that it does not have an actuator for the front axle.


Any help would be much appreciated.  Thanks in advance.



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1999 Jeep Cherokee Sport 4X4 4.0L Auto
1989 Jeep Cherokee 4X4 4.0L 5-spd (Using more oil than gas...)
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Being that they are both from an '89 the answer is short is "yes".

They both should be a 21 spline TC, and they will bolt up without issues. Just make sure you use the appropriate linkage from the 231 or the 242 when your swapping them.

The speedo sensor is the biggest issue. I belive you can just use 2 of the 3 wires on the speedo sensor and it will still work. One of them is just a neautral wire and is not needed when doing the swap.

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OtsiderCherokee
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When you say appropriate linkage, what do you mean? Do you mean to use the linkage from the donor vehicle?  I guess I am a bit clueless when it comes to transfer cases and such.

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By linkage I ment selector/rod (handel and everything attached to it). If I recall they are slightly different, so use the same linkage that you use the TC out of. It will help prevent any binding.

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OtsiderCherokee
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Yeah, I was planning on using the handle and such from the Command Trac. There is a 4WD Full Time option on the Selec Trac. I will probably switch the indicator lens and such as well.

Will there be any differences due to the Wagoneer's front diff not having an actuator on it like my Cherokee does?

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OtsiderCherokee wrote:
Will there be any differences due to the Wagoneer's front diff not having an actuator on it like my Cherokee does?
You will have to do one of the following.

1) Modify the CAD (actuator) to be always on. Look under my MJ build thread (project budget manche) in Members Ride to see how to do it.

2) Pull the pass axle shaft out of the Waggy and install in place of your axle shaft in your CAD axle. This will change it from a 2 peice axle side shaft to a 1 peice shaft.

3) Buy the 4x4 Posi Lock unit (not worth it in my opinion).

4) Swap in the waggy axle. If you attempt this, check twice that the gear ratio's match.

 



-- Edited by LEAD_NOT_FOLLOW at 21:00, 2008-01-12

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OtsiderCherokee
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What does CAD stand for?

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OtsiderCherokee wrote:
What does CAD stand for?
Central Axle Disconnect

It's the vacume actuated pump that pushes the sleave over to connect to the 2 peices of the 2 peice driveshaft.

 



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OtsiderCherokee
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Ok, I wasn't sure.

I do not see one of those on the Wagoneer.

My other Cherokee does and I have replaced the vacuum actuator with a Posi-Lok.

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Than your good.

Just a FYI, the CAD axle was not used on a NP242 equipped XJ. It was only used on 84-90 NP231 equipped XJ's.

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OtsiderCherokee
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So the way it sounds to me, my Wagoneer probably has an NP242 TC, and my Cherokee probably has an NP231. Am I on the right track?

So the NP231 will bolt up in place of an NP242?

Sorry if these questions are redundant, I am trying to understand what I am going to have to do.



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1999 Jeep Cherokee Sport 4X4 4.0L Auto
1989 Jeep Cherokee 4X4 4.0L 5-spd (Using more oil than gas...)
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NP231 = Command Trac
NP242 = Select Trac

There was another Command Trac TC used in 84-97 and another Select Trac TC used in 84-87 but I won't confuse you with those. yawn

Yes, the NP231 and the NP242 are interchangable (aka bolt-up).

To add to the discussion....

The NP242 only has a hack-n-tap available for it in the Slip Yoke Eliminator (SYE) department, so depending on how high your lifted and if you want to do an SYE consider that. Whereas the NP231 has a HD SYE available for it that is a lot stronger and a better option.

The NP242 is a part time OR full time 4wd TC. So many prefer this one for road driving as they can put it in part time on the road in bad weather conditions and just not worry about it.

The NP231 is ONLY a full time 4wd TC. Many prefer this in offroad applications more as they are considered the stronger TC of the 2.

Have I confused you even more? evileye

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'93 XJ Cherokee Sport - build thread
'89 XJ Cherokee Laredo - build thread
'88 MJ Comanche Pioneer SWB - build thread
'87 MJ Comanche LWB
'94 YJ Wrangler - build thread


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OtsiderCherokee
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I do not plan on lifting the Wagoneer at all. It will be more for on road. It doesn't matter to me that if the 4WD is full time, I don't use it unless it is slick.

Eventually I'd like to do the Cherokee up to have fun in the mud, but have no idea when that will be.

So it sounds like it should be a go to do the swap.

Thanks for your help.

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1989 Jeep Cherokee 4X4 4.0L 5-spd (Using more oil than gas...)
 
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