4x4 delay

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

I have noticed over the last few weeks that there seams to be a delay from the time the lever is pulled to when it is actually IN. (first winter with the CRD) I'm used to the old xj, when you pull in is in and not is not. I have noticed with this jeep that if it is spinning it will still allow you to pull the lever In. My old jeep you had to let off then pull it in or the gears would not mesh and it would sound like a 16yr old with a 5 speed lol. I have also noticed a click when it is disengaged that sounds like a solenoid. So i'm guessing that the lever isn't a full on mechanical lever like the old school stuff was? Or maybe its due to the crd having the 4part,4full and 4 low option as the xj's i had and have been around never had that just 4part and 4 low. Or are they just making them even more Retard proof??

I've just been running in 4part when i think i might need it so i don't have to fight it up hills slowing the cars/trucks behind me until it finally would engage.

The other thing... I HATE that you can't put it sideways when you want to play darn thing always corrects it even with the traction control off.. :banghead:

Joe Romas · **Posted:** Thu Dec 30, 2010 4:21 pm

Unfortunatly it's "normal" for our Select Track NV242 transfer case that has "full Time Four Wheel drive" in addition to "Part time four wheel drive. Your old jeep had a Command Track and only had Part Time four wheel drive. It was a NV232.

What your noticing is the shift fork is spring loaded on the selector shaft on the Select Track. On your old "Command Track" the shift fork was mounted rigid to the selector shaft.

So on your CRD when the planets all align the spring will push the shift fork into the desired mode...sometimes :shock:

All your tires need to be the same including amount of tread and inflated to the same pressure. The real problem arrises when you shift from 4x4 full time back to 2 wheel high it has to pass through 4x4 part time and it tends to hang there. Different people have different ways that work for them. I own two jeeps with the NV242 and they both act the same. Here's how I get back into 2 hi. While traveling in a stright line shift first to 4 part time for a few hundred feet then into 2 hi. You can feel if the lever springs or actually does something :POPCORN:

If your not aware of what's going on it will get stuck in 4 part time regardless where the lever is and what light on the dash is or is not on. You'll turn a corner and feel it binding badly :dizzy:

I'm sure others will chime in and tell you to "blip" the throttel but that's very hard to do on a drive by wire engine like our CRD's :BANANA:

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

They planet/moon/stars alignment really sucks when you have cars behind you and you come on a wind blown hill and are dancing around like a fool that doesnt know how to drive. Did that the first time i had used it in the snow to the point that i thought it might have not been working lol, i let off to stop the spining and got back in it only to keep spinning.

Example. My driveway. Its slightly uphill, spinning so i let off, stop and pull it in 4dig, coast back (all in N) a little, bump the peddle still no 4x4, let off again and coast back onto the road and go, still no 4x4 3rd try the worlds gravitational pull must have been right and it worked lol.

It seams that if it was spinning it takes WAY longer for it to let it engage than if if did not so i just put it in early now if i think i'll need it.

Thanks for the confirmation of what i had thought it was. I haven't really had any problems with taking it out, just getting it to engage. And the past few weeks i just put it in when i think i'll need it and run it, as much as the cold/winter fuel hurts my MPG i can't really see any diff.

Joe Romas · **Posted:** Thu Dec 30, 2010 5:38 pm

When the weather is bad leaving it in full time makes it always ready for that unexppected drift :BANANA:

arengant · **Posted:** Thu Dec 30, 2010 9:49 pm

I ran into the same problem... After reading the owner's manual, it suggested giving it a 2-3 second throttle-release throttle cycle. I started doing that, and it worked (kinda like rev it 3 seconds, then coast 3 seconds) Then I check by doing a corner to see if it's in Part Time. Works to go back to 2wd also

The manual also says going from D to R a few times with foot on brake a stop helps (also for 4 LO)

DynoPax · **Posted:** Fri Dec 31, 2010 1:16 pm

How coincidental, same thing happened to me this very morning when leaving home to work...

As I turned out of my long driveway onto the snow-covered dirt road, it got to a very slippery situation, with above freezing temps and slight drizzle from last night. I switched it to full 4x4 until I reached the main road, then shut it out. I usually stop and give it some time, going through each setting one at a time, so to give it a chance to ack and revert to normal ops, but not this time. I did it on the fly, directly from 4x4 full to 2x4 high. It somehow stayed stuck in 4 wheel drive mode, even with the lever down and no light in dash.

Stopped on side of road after 10 minutes and pulled the lever; it literally springed back to 4x4 full, as if it was still stuck in that position. I then proceeded step by step, slowly, and it recovered normally as I sped back onto the road... how peculiar

arengant · **Posted:** Sat Jan 01, 2011 7:38 pm

I experience the "spring engagement" feel today. I shifted to 2wd from part time, and kept my hand on the lever. After giving it a little gas, then coasting for a few seconds, the lever was snapped back down all the way into 2wd. So I guess you can just feel when it changes modes.

ATXKJ · **Posted:** Sat Jan 01, 2011 8:47 pm

When you push the engagement lever - you push against a spring -
and the spring pushes against a gear cluster
and when all the gears are aligned (and not before) - the gears move to engage

if your tires are mismatched - size/wear/pressure - the gears may never align

- although typically the 'Full time' mode because of the front rear differential will still find some point to click - but 'part time' won't

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

ATXKJ wrote:

When you push the engagement lever - you push against a spring -
and the spring pushes against a gear cluster
and when all the gears are aligned (and not before) - the gears move to engage

if your tires are mismatched - size/wear/pressure - the gears may never align

- although typically the 'Full time' mode because of the front rear differential will still find some point to click - but 'part time' won't

so in a situation where you need it right now your better off just going into part time?

litton · **Posted:** Sun Jan 02, 2011 12:14 pm

I don't know about you guys, but I'v found the full time to be awfully effecive and now don't even use part time unless I need the low range. Of course down here I'm typically in sand, dirt, and shale so it may be differant.

ATXKJ · **Posted:** Sun Jan 02, 2011 4:06 pm

mustang_gt_350 wrote:

so in a situation where you need it right now your better off just going into part time?

No - 'Full time' is the best bet - the center diff adds some slop
if you have any mismatch front to rear - 'part time' and 4 low - may never engage.

litton · **Posted:** Sun Jan 02, 2011 4:17 pm

I just remembered another reason I don't use part time....if I hit a patch of hard pan (almost like concrete) there is binding in the drive train whitch I don't like at all. I imagine the same would hold true in snow....hit a clear patch and the jeep is not happy.

1TDI4Me · **Posted:** Sun Jan 02, 2011 11:43 pm

mustang_gt_350 wrote:

The other thing... I HATE that you can't put it sideways when you want to play darn thing always corrects it even with the traction control off.. :banghead:

So, just how do you turn off the traction control on an '06? I would like to have mine permanently disabled.

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

1TDI4Me wrote:

mustang_gt_350 wrote:

The other thing... I HATE that you can't put it sideways when you want to play darn thing always corrects it even with the traction control off.. :banghead:

So, just how do you turn off the traction control on an '06? I would like to have mine permanently disabled.

I don't know if it works (haven't tried it) but i would guess if you pulled the fuse for the ABS system it should disable it?

LibertyCRD · **Posted:** Mon Jan 03, 2011 11:55 am

Both of my CRDs have always engaged instantly. Even at a dead stop, they'll pop right in.

To disengage, sometimes I have to back up 12 inches to unlock, then shift back to Drive and I'm ready to go....but usually it will just disengage without doing that too.

Many 4x4s over the years have required you to back up a short distance to unlock the t-case...it's not only Jeeps.

mdalien · **Joined:** Tue Jun 22, 2010 10:22 pm **Posts:** 41

My solution is to let off the gas, put in N, push the lever hard from 4PT or 4 FT to 2 and then drop back into D.
Sometimes get great clunk, sometimes not. Always goes back to 2. From 2 to 4 when start spinning in the driveway, have to go to R a lot.

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

mdalien wrote:

My solution is to let off the gas, put in N, push the lever hard from 4PT or 4 FT to 2 and then drop back into D.
Sometimes get great clunk, sometimes not. Always goes back to 2. From 2 to 4 when start spinning in the driveway, have to go to R a lot.

I tried somthing yesteday while i was spinning in my driveway. Let off, put it in N and then went right to 4L. I think due to the gearing and distance traveled it lines up faster?

kapalczynski · **Posted:** Wed Jan 05, 2011 2:43 pm

mustang_gt_350 wrote:

I have noticed over the last few weeks that there seams to be a delay from the time the lever is pulled to when it is actually IN. (first winter with the CRD) I'm used to the old xj, when you pull in is in and not is not. I have noticed with this jeep that if it is spinning it will still allow you to pull the lever In. My old jeep you had to let off then pull it in or the gears would not mesh and it would sound like a 16yr old with a 5 speed lol. I have also noticed a click when it is disengaged that sounds like a solenoid. So i'm guessing that the lever isn't a full on mechanical lever like the old school stuff was? Or maybe its due to the crd having the 4part,4full and 4 low option as the xj's i had and have been around never had that just 4part and 4 low. Or are they just making them even more Retard proof??

I've just been running in 4part when i think i might need it so i don't have to fight it up hills slowing the cars/trucks behind me until it finally would engage.

The other thing... I HATE that you can't put it sideways when you want to play darn thing always corrects it even with the traction control off.. :banghead:

The XJ used a vaccuum actuated lever system. It, with lever pulled, would use vaccuum force to move a diaphragm that pushed on a lever that slid a collar connecting one of the front drive shafts to the rest of the system. When 4x4 is "disnegaged" on the XJ really only the 1 wheel is free spinning and half of its drive shaft...the other three and drive shafts are connected to the system and half of the 4th front drive shaft. So Really 4wd is always engaged even in 2high on the XJ except for half of 1 of the front driveshafts.

Also, it actually never disengaged or engaged the transfer case unless using 4-Low where you had to stop, place it in neutral, shift the t-case and put in drive again. This is why it seemed faster i suppose. It only had to slide a coller over to connect the shaft and could do this while moving even really slow and obviously would nearly instantly engage if you were spinning the other tires

litton wrote:

I just remembered another reason I don't use part time....if I hit a patch of hard pan (almost like concrete) there is binding in the drive train whitch I don't like at all. I imagine the same would hold true in snow....hit a clear patch and the jeep is not happy.

Yeah part time locks the center diff and full time opens it to prevent binding for concrete, etc.

Joe Romas · **Posted:** Wed Jan 05, 2011 3:49 pm

[quote="kapalczynski]The XJ used a vaccuum actuated lever system. It, with lever pulled, would use vaccuum force to move a diaphragm that pushed on a lever that slid a collar connecting one of the front drive shafts to the rest of the system. When 4x4 is "disnegaged" on the XJ really only the 1 wheel is free spinning and half of its drive shaft...the other three and drive shafts are connected to the system and half of the 4th front drive shaft. So Really 4wd is always engaged even in 2high on the XJ except for half of 1 of the front driveshafts.[/quote]

That was only on the real old XJ's. My 89 had it but by 96 it was gone as my 96 didn't have it.

Back in 89 the front hubs on a lot of 4x4's could be unlocked to free wheel the front wheels saving gas and wear. That's why the XJ's had the vacuum stuff. Some hubs were totally manual and some were termed automatic and worked by putting it in 4x4 and backing up or something like that :lol:

Sir Sam · **Posted:** Wed Jan 05, 2011 4:33 pm

kapalczynski wrote:

The XJ used a vaccuum actuated lever system. It, with lever pulled, would use vaccuum force to move a diaphragm that pushed on a lever that slid a collar connecting one of the front drive shafts to the rest of the system. When 4x4 is "disnegaged" on the XJ really only the 1 wheel is free spinning and half of its drive shaft...the other three and drive shafts are connected to the system and half of the 4th front drive shaft. So Really 4wd is always engaged even in 2high on the XJ except for half of 1 of the front driveshafts.

Thats only on the REAL old XJs, by 87 when the 231 and 242 were being used the system changed, the 242 did not have the CAD(center axle disconnect) on the front axle, the 231 did still have the CAD(which almost never worked correctly so most people just ended up locking it solid via washers) but the 231 still shifted just like it does today.

4x4 delay

Who is online