2000 Sport, How does the 4WD work on these trucks??
#1
Thread Starter
Seasoned Member
Joined: Aug 2008
Posts: 298
Likes: 1
Year: 2000
Model: Cherokee
Engine: 4.0L
2000 Sport, How does the 4WD work on these trucks??
What I need is an overview of how the 4WD works on my 01 Sport..
I assume the hubs are automatic since there is no way to lock/unlock them?
How do they work ??
When I go into 4-High the dash indicator says "Part Time" Does this mean I need to be in 4-Low to get the axles to lockup ??
I have heard talk of some type of vaccuum motor related to the 4WD what does this do ??
Any information will be helpfull in me understanding how this works...
Thanks
Matt
I assume the hubs are automatic since there is no way to lock/unlock them?
How do they work ??
When I go into 4-High the dash indicator says "Part Time" Does this mean I need to be in 4-Low to get the axles to lockup ??
I have heard talk of some type of vaccuum motor related to the 4WD what does this do ??
Any information will be helpfull in me understanding how this works...
Thanks
Matt
#5
What I need is an overview of how the 4WD works on my 01 Sport..
I assume the hubs are automatic since there is no way to lock/unlock them?
How do they work ??
When I go into 4-High the dash indicator says "Part Time" Does this mean I need to be in 4-Low to get the axles to lockup ??
I have heard talk of some type of vaccuum motor related to the 4WD what does this do ??
Any information will be helpfull in me understanding how this works...
Thanks
Matt
I assume the hubs are automatic since there is no way to lock/unlock them?
How do they work ??
When I go into 4-High the dash indicator says "Part Time" Does this mean I need to be in 4-Low to get the axles to lockup ??
I have heard talk of some type of vaccuum motor related to the 4WD what does this do ??
Any information will be helpfull in me understanding how this works...
Thanks
Matt
but...
they are automatic hubs
part time means dont drive on dry pavement with it.
full time you can drive all the time on it.
#6
Thread Starter
Seasoned Member
Joined: Aug 2008
Posts: 298
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Year: 2000
Model: Cherokee
Engine: 4.0L
Nope.
Just the 4-high 4-low and 2-high select....I read something in the owners manual about this but it made no sense.
When I go to 4-high a "Part Time" light comes on on the dash. I think when in 4-low the axles are locked,because the manual does say not to drive on dry pavement when in 4-low???
Just the 4-high 4-low and 2-high select....I read something in the owners manual about this but it made no sense.
When I go to 4-high a "Part Time" light comes on on the dash. I think when in 4-low the axles are locked,because the manual does say not to drive on dry pavement when in 4-low???
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#8
Yes they are. You have an NP231 t-case. You can engage 4 high at any speed under 55, just pull it in and it should go. Low needs a complete stop, tranny in neutral, then pull it in and it should go. To take it out, reverse the steps, and back up a little, but it's been my experience that every vehicle likes a certain sequence of events, you have to find what yours likes. If you need more help or info send me a message and I can explain in more detail. HTH!! Laters!!
#9
Thread Starter
Seasoned Member
Joined: Aug 2008
Posts: 298
Likes: 1
Year: 2000
Model: Cherokee
Engine: 4.0L
Yes they are. You have an NP231 t-case. You can engage 4 high at any speed under 55, just pull it in and it should go. Low needs a complete stop, tranny in neutral, then pull it in and it should go. To take it out, reverse the steps, and back up a little, but it's been my experience that every vehicle likes a certain sequence of events, you have to find what yours likes. If you need more help or info send me a message and I can explain in more detail. HTH!! Laters!!
I have noticed that it has to be stopped and in "N" before it will go to 4-low.
So the only real difference in 4-low and 4-high is the higher RPMs, No difference in operation of the 4wd ??
#10
CF Veteran
Joined: Nov 2008
Posts: 1,077
Likes: 21
From: Herndon, VA
Year: 1996
Model: Cherokee
Engine: 4.0
That's right, 4lo just changes the gear ratio and puts you into a "crawl mode".
#11
For a 2000 what is vacuum operated is the lock up for the front axle. The hubs are all time, so when driving in 2wd your front drive shaft will still turn a little due to the shafts rotating, its normal, it helps the gear oil still flow around everything, etc.
I know "lock up for the front axle" isn't the right term for the goofy part, but I can't remember what the goofy thing is called :P
I know "lock up for the front axle" isn't the right term for the goofy part, but I can't remember what the goofy thing is called :P
#12
CF Veteran
Joined: Nov 2008
Posts: 1,735
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From: Metro Denver, CO
Year: 1987
Model: Cherokee
Engine: 4.0L
The vacuum engages the front hubs. If this breaks, no 4WD for you (happened to me, no fun). Nice thing about 4wd, is if your park (auto) or e-brake (manual) fails, you can just stop it in gear with 4wd on and it'll keep you from rolling away.
#13
Thread Starter
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Joined: Aug 2008
Posts: 298
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Year: 2000
Model: Cherokee
Engine: 4.0L
I seen on 4WD's site they have a cable that replaces the vaccuum unit, So you can manually shift it from inside the truck..
#14
Renix Super Guru
Joined: Mar 2008
Posts: 24,653
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From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Not all Jeep Cherokees have the vacuum disconnect mentioned above. You can determine if you have it by looking at the right (passenger) side axle tube under your Jeep. If the tube is just a horizontal cylinder then you do NOT have a disco axle. If you see a bump and a vacuum line then you have a disco axle.
#15
Thread Starter
Seasoned Member
Joined: Aug 2008
Posts: 298
Likes: 1
Year: 2000
Model: Cherokee
Engine: 4.0L
Not all Jeep Cherokees have the vacuum disconnect mentioned above. You can determine if you have it by looking at the right (passenger) side axle tube under your Jeep. If the tube is just a horizontal cylinder then you do NOT have a disco axle. If you see a bump and a vacuum line then you have a disco axle.