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4wd disengage the right way?

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TJ Apex
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Joined: 29 Jul 2005
Location: Mountains of SoCal. 6257 elev.

PostPosted: Thu Feb 23, 2006 5:51 pm    Post subject: 4wd disengage the right way? Reply with quote

This may sound stupid but, I was reading about a t-case problem in a another post and started thinking, what is the right way to disengage the t-case. When I bought my TJ it didnt' come with a owners manual so I'm not sure if I'm shifting out correctly.
After 4Xin, I just stop and shift it into 2H put in reverse and roll back for a few feet and go and have had no problems.
I use to own a 4X Suburan and the manual read you must go into reverse to disengage the t-case. so I've been doing the same thing to the jeep.

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ehirner
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PostPosted: Thu Feb 23, 2006 6:11 pm    Post subject: Reply with quote

You need to take the load off the t-case so it fully drops out. It will stay in 4wd if you don't.

I do it the way you described.
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TJ Apex
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Joined: 29 Jul 2005
Location: Mountains of SoCal. 6257 elev.

PostPosted: Thu Feb 23, 2006 6:16 pm    Post subject: Reply with quote

I have heard of people just comming to a stop and shift out and not bother reversing and they have had no problems eather.
But I will continue to do as I said before.
Thanks...
Come to think of it, maybe thats whats going on with the other guy...
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ehirner
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PostPosted: Thu Feb 23, 2006 6:33 pm    Post subject: Reply with quote

TJ Apex wrote:
I have heard of people just comming to a stop and shift out and not bother reversing and they have had no problems eather.
But I will continue to do as I said before.
Thanks...
Come to think of it, maybe thats whats going on with the other guy...

Sometimes, it works. Sometimes, just a bit of reverse will be enough.
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TJ Apex
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PostPosted: Thu Feb 23, 2006 10:22 pm    Post subject: Reply with quote

Thanks again
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paracutin
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PostPosted: Fri Feb 24, 2006 1:42 pm    Post subject: Reply with quote

That seems to be it. I read this post and ran out to the TJ to try it. After shifting into 2H and backup up a few feet everything was fine. That procedure is NOT in the manual. I have only owned AWD vehicles up unil three months ago when I bought my 2000 TJ so no shifting was ever required.
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TJgirl
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PostPosted: Fri Feb 24, 2006 5:03 pm    Post subject: Reply with quote

I just posted this in the other post. yes I have had 7 4wheel drive vehicles and always put it in reverse and backed up about ten feet to make sure they were out of 4wheel drive. it has only been in one of my manuals that I can remember, it was a K5 chevy Blazer. but I have done that in both my Jeeps just to make sure, doesn't hurt!
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TJ Apex
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PostPosted: Sat Feb 25, 2006 7:21 am    Post subject: Reply with quote

TJgirl wrote:
I just posted this in the other post. yes I have had 7 4wheel drive vehicles and always put it in reverse and backed up about ten feet to make sure they were out of 4wheel drive. it has only been in one of my manuals that I can remember, it was a K5 chevy Blazer. but I have done that in both my Jeeps just to make sure, doesn't hurt!


Like you I owned a 89 suburan and the manual read that you had to reverse to disengage the 4WD and it also had a sticker on the sunvisor stating the same thing.
Makes you wonder why DC doen't put this in wrighting some where like GM does.

And it sounds like paracutin found the problem too.
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canuck4welr
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PostPosted: Sat Feb 25, 2006 2:30 pm    Post subject: Reply with quote

My 2000 manual has nothing stating that it should be put in reverse, i've never had to do this procedure before either. I agree it dont hurt, but would it not be resonable to assume that if it's not required and you now need to, there may be something wrong?
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kizer
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PostPosted: Sat Feb 25, 2006 5:26 pm    Post subject: Reply with quote

I just shift on the fly. If attempt to turn and it feels my front end is still engaged I press down the clutch. Normally shifting on the fly has always worked fine for me.

The only time I do anything differently is if Im shifting from 4low to 4high. THen its either a complete stop or a slow roll. I shift Trans into N. Then T-case into 4high. Trans back into gear and Im off.
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TJ Apex
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Location: Mountains of SoCal. 6257 elev.

PostPosted: Sat Feb 25, 2006 10:08 pm    Post subject: Reply with quote

I have shifted on the fly a couple times once at around 15mph or so and had no problem.
I guess I just got use to doing the reverse thing from my Chevy, The only drivetrain differance was that the Chevy was an automatic and my TJ is a 5spd, I don't know if that would make a differance or not.
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canuck4welr
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PostPosted: Mon Feb 27, 2006 9:12 am    Post subject: Reply with quote

Mine is automatic, i shift on the fly. no problems
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scorpio_vette
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PostPosted: Mon Feb 27, 2006 10:31 am    Post subject: Reply with quote

that whole deal about backing up a few feet was old school technology.

it doesn't hurt to do it if that's what makes you happy, but it's not required for todays new vehicles. the t-cases today are designed to shift-on-th-fly.

basically you can engage/dis-engage 4HI at any safe driving speed (that's usually limited to 55mph or less). so if your on the highway and suddenly it starts snowing or whatever, you can just engage it/disengage it.

sometimes when you disengage and continue driving, it may feel like it still engaged. that basically just means the hubs haven't unlocked themselves yet, and will usually go away after a few more rotations.

now shifting into 4LO is a completely different story. it is recommended to be stoped with the tranny in neutral when engaging 4LO.
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Last edited by scorpio_vette on Wed Feb 02, 2011 5:02 pm; edited 1 time in total
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paracutin
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Joined: 06 Dec 2005

PostPosted: Mon Feb 27, 2006 11:04 am    Post subject: Reply with quote

That isn't true with the TJ. There are no hubs to disengage. Without backing up mine will not come out of 4wd and it doesn't just "feel" like it's in, it is in. I have driven for miles with the "feeling" and after I back up for a few feet it goes away.
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scorpio_vette
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PostPosted: Mon Feb 27, 2006 1:18 pm    Post subject: Reply with quote

paracutin wrote:
That isn't true with the TJ. There are no hubs to disengage. Without backing up mine will not come out of 4wd and it doesn't just "feel" like it's in, it is in. I have driven for miles with the "feeling" and after I back up for a few feet it goes away.


i didn't mean hubs as in "manual locking hubs". either way, your right....hubs was the wrong word.

basically if you're moving in 4wd, there is load on all the parts in the axle that are engaging. so even if you disengage 4wd, the meshed parts may continue staying that way under load. usually coming to a stop or even letting off the gas should "unload" the parts.

i've owned these jeeps for about 6 years and never stop to disengage them like i used to with my old trucks.

now of course some vehicles may or may not free up easier after disengaging. nothing is perfect. but it won't hurt anything to keep driving after you take it out of 4wd. and that's basically what the question originally was. like i said earlier. there is nothing wrong with the whole "backing up a couple feet" if it makes you feel better. but sometimes your in situations where you don't have the time/space to stop and backup.
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Last edited by scorpio_vette on Wed Feb 02, 2011 5:03 pm; edited 1 time in total
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