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XJ Ask the Question Thread
CF Veteran
Joined: Oct 2009
Posts: 2,867
Likes: 16
From: Fauquier County, Virginia
Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
My alt was wired perfectly and was only about a year old when it went bad. So, what went wrong? A gecko.
No joke. You read that right. A gecko crawled in and got fried and shorted it out. Wierd contaminants like random reptiles will shorten alternator life or cause intermittent charging. Just get it checked out at vatozone, advance, etc...
No joke. You read that right. A gecko crawled in and got fried and shorted it out. Wierd contaminants like random reptiles will shorten alternator life or cause intermittent charging. Just get it checked out at vatozone, advance, etc...
Seasoned Member
Joined: Dec 2013
Posts: 473
Likes: 0
From: SATX
Year: 1999
Model: Cherokee
Engine: 4.0 I6
Member
Joined: Jul 2010
Posts: 103
Likes: 0
From: Georgia
Year: 1988
Model: Cherokee
Engine: 4.0L HO from a 91 Comanche.
The switches on either side of the steering wheel? My laredo has four switches, fog lights, rear window wiper, rear window defrost, tranny power/ comfort modes. Not sure if that's what you're asking about
Yes 97+ I guess I should have been more specific. Sorry. Yes the defrost, rear wiper, fog light, extended idle. Not the switches them selves just the bezel or panel. Im sure some of you have seen them even been a few for sale but I think the last one I saw went for 200$. I have a friend that lives in Germany. If I could find the factory part number I could have him see what he can find. He was intrigued by the possible scavenger hunt. I only need one so any I can get past that will be sold for what he and I have in them. Well thats the plan anyway.
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Hypothetical question:
If someone wanted to make a Jeep primarily FWD instead of RWD, could that modification be made to an NP231? Or would the internal configuration fundamentally prohibit that?
If someone wanted to make a Jeep primarily FWD instead of RWD, could that modification be made to an NP231? Or would the internal configuration fundamentally prohibit that?
modification like removing the rear driveshaft? I took apart enough 231's to see that there is just a simple chain driven by a mode collar on the main shaft. U can just leave it in 4 high and remove the driveshaft. Longevity is a question though. I do know few who drove fwd for months and didn't have issues except for when turning because of the U joint binding
CF Veteran
Joined: Jan 2015
Posts: 1,381
Likes: 3
From: Southern Maryland
Year: 1991
Model: Cherokee
Engine: 1999 4.0L
The NP231 is a box of shafts and gears. You can't change its behavior. The easiest thing would be to get a twin-stick transfer case like a Dana 20 and disengage the rear. If you really want to keep the NP231, one option would be to put some lockout hubs on the rear axle, but that will depend on whats back there (its an option for D44, don't know about others). Maybe some kind of clutch on the rear output shaft if you are want to actually fab something from scratch.
Last edited by ehall; Feb 21, 2015 at 05:20 PM.
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
04897505AE
Third hit in Google

1996 is a tough call because you could have a totally random PCM - OBD-I, the special '96 PCM, or later OBD-II. If it's the same PCM as a 1997, then yes. These would've been built at the end. Most PCMs is 1996 model year XJs won't have the extended idle option.
Much easier to get a transfer case that can do that already
Senior Member
Joined: May 2012
Posts: 651
Likes: 0
From: Fayetteville, NC
Year: 1996
Model: Cherokee
Engine: 4.0
I have obd2. Wow didn't know 96 was that much of the so called "bastard" year
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
modification like removing the rear driveshaft? I took apart enough 231's to see that there is just a simple chain driven by a mode collar on the main shaft. U can just leave it in 4 high and remove the driveshaft. Longevity is a question though. I do know few who drove fwd for months and didn't have issues except for when turning because of the U joint binding
04897503AE
04897505AE
Third hit in Google

1996 is a tough call because you could have a totally random PCM - OBD-I, the special '96 PCM, or later OBD-II. If it's the same PCM as a 1997, then yes. These would've been built at the end. Most PCMs is 1996 model year XJs won't have the extended idle option.
Nope. The front output chain is driven by the main shaft. Unlike mods like 2L and 4:1, which basically replace parts or make use of things that already exist, modifying the way the drive sprocket is powered would require a total redesign and possibly some extra length. Also the speedometer/VSS is driven by the main shaft, so it'd need to stay turning anyway. You could potentially rig something that can disconnect the rear propeller shaft from the transfer case output but then you'd have to deal with the chain stretching.
Much easier to get a transfer case that can do that already





