U dont have to stop and put your jeep in nuetral and then 4wd and then back in drive and continue

 

Is that a statement or a question?

 

question

 

No. It's "shift on the fly". Leave it in Drive if an auto, in gear if a manual. Let off the gas, make your shift, tap the gas and let off once and accelerate from there.

But, get it into 4H and then stop, put it into neutral before engaging 4L.

 

OMG guys you are confusing as hell. ALL NP242 T case equipped XJs have no front end disco meaning the front drive shaft ALWAYS spins unless you're power braking or stuck in 2wd. In full time, the power goes through 3 differentials to make it to the ground (1 in front, 1 in back, and 1 in the center). If you have auto lockers, the front one will try to kill you, and the rear one will function as normal for the most part. If you have open diffs, literally 1 wheel could get all the power if it has a slippery condition under it. You could put it in full time and simply lift one tire off the ground with a floor jack and make it non mobile. Even if you're hauling a heavy trailer, you could possibly have extreme difficulty pulling up a hill on a dirt road as just one of your front wheels might spin (had that problem before). If you have it in 2wd, 100% of the power goes to the rear no matter what so in the case of hauling a heavy trailer, 2wd would be better and possibly bump it in part time if you end up in a sticky situation that requires extra traction. Full time is best recommended for rainy days or light snowy conditions NOT hauling a trailer. That's about all it would actually help out in. Any Jeep that doesn't have a front end disco can be put in any high range mode at any speed the thing can actually go. Low range should probably come to a stop or pretty close in neutral. Not like range reducer gears have syncros on them

 

* if you have a front end disco, go slow putting it in 4 hi

 

The Jeeps with front end discos like the NP231s can be shifted into and out of 4wd at any legal speed.

 

You can if you want but I really don't like the idea of an axle shaft spinning completely backwards being instantly slammed into the opposite direction. My Z71 does it all the time but it doesn't apply power to it and it has a synchro in the front end disco

 

wen I put it in 4wd i just stop and slip it into nuetral real quick an then 4wd and put it back in drive an go on truckin down the trail

 

Of course guys with 91 and later can slip it in 4X4 at any speed between 0 and 200 cuz they don't have discos on any of them

 

FYI I converted every one of my older XJs to having no disco by using the axle out of a later model

 

If I have it in drive wen I try to put my 89 in 4wd it clunks like thats not suppose to happen but wen put in nuetral it goes in 4wd fine

 

Done it numerous times at speeds of up to 80 MPH. Keep in mind I had 13 Comanches as demos at the dealership, all equipped with the part-time t-case. Nothing to worry about.

Personally though, I'm in favor of eliminating the disco crap by sliding the collar over and locking it in place with teh c-clip.

 

Exactly my point. The left half of your passenger's axle is rotating backwards via the diff and the right half is going froward then when the disco engages, the 2 opposite speeds meet each other with violent force. If you are going 35 when you kick it in, that's a 0 to 70 impact of the disco's coupling. You're brave cruiser

 

That makes me suspect you have issues with your front axle shift motor. Do this and save yourself from getting stuck some day.



https://www.cherokeeforum.com/f51/fr...ss-91-a-38629/