4 wheel drive part time vs full time?
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I should have been clearer. I meant paved roads with snow, ice etc. Just like the guys with PT would have to do since they have no FT. But yes, you better shift out of PT when you hit a clear spot. With FT you can just forget about the shifting in and out.
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Thread Starter
Senior Member
Joined: May 2011
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From: Paramus NJ
Year: 2002
Model: Grand Cherokee
Engine: 4.7L HO V8
okay thanks guys. To engage 4 wheel do i have to put it in reverse to engage it? i know in my dads ford bronco it engages in reverse
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
The Jeep transfer cases like we're talking about here were designed to be "shift on the fly". You can shift from 2H to 4H at up to 55 MPH. It's best done above 20MPh and using this method:
Let off the gas, throw the lever, tap the gas and let off to facilitate the shift.
That said, shifting into 4 low should be done AFTER shifting into 4H, stopped, with the trans in Neutral.
Let off the gas, throw the lever, tap the gas and let off to facilitate the shift.
That said, shifting into 4 low should be done AFTER shifting into 4H, stopped, with the trans in Neutral.
CF Veteran
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From: Brighton, MI
Model: Cherokee
where do you get that from? those numbers appear to be the last number in the case.
example:
231/241 are part time case.
242 is a full time case.
247 is (likely) the geo case.
249 is the viscous case.
so in all reality, the 231 and the 241 are the stronger cases. 241 is found in the jeep rubicon.
but anyway. that's not the question here.
to the op, no worries using full time off road. it would be fine, just try to stay away from using part time on road. unless you only use it for snow covered roads and disengage when you hit dry road. better to just use full time option and fuhgeddaboudit,
example:
231/241 are part time case.
242 is a full time case.
247 is (likely) the geo case.
249 is the viscous case.
so in all reality, the 231 and the 241 are the stronger cases. 241 is found in the jeep rubicon.
but anyway. that's not the question here.
to the op, no worries using full time off road. it would be fine, just try to stay away from using part time on road. unless you only use it for snow covered roads and disengage when you hit dry road. better to just use full time option and fuhgeddaboudit,
NP231 being:
NP = New Process Gear
2 = Two Speed
3 = Strength on 1-7 scale
1 = Part-time 4WD
NP242 being:
NP = New Process Gear
2 = Two Speed
4 = Strength on 1-7 scale
2 = Full-time 4WD
Also, it's straight from New Venture Gear.
EDIT: To the OP, everyone has filled you in with good info.
Last edited by OnlyInMyXJ22; Nov 1, 2011 at 09:15 AM.
CF Veteran
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From: Northern Ontario, Canada
Year: 1990, 1999, 2000
Model: Cherokee
Engine: 4.0
ok, i'm confused, cause there's no way a viscous coupler is stronger than a 231. and no way the 242 is either.
so i don't know how that chart works.
so i don't know how that chart works.
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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From: Brighton, MI
Model: Cherokee
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From: Chattanooga
Year: 2001
Model: Cherokee
Engine: 4.0
so on my 231 when I go into 4 lo or high which can be used "full time" I know I have a primarly part time t-case but I have a full time light that comes on occasionally. When I was on mt aetna a few weeks ago I was going up the trail which was basically just dirt with some decent rocks in part time and I had zero problems, but since winter is coming up I need to figure out how to get into 4x4 full time to cruise the snowy streets.
Thread Starter
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From: Paramus NJ
Year: 2002
Model: Grand Cherokee
Engine: 4.7L HO V8
alright thanks guys so is it bad that wen i shift into 4 full time i stop the jeep put it into neutral and then shift, then put it into drive? can i do it like this or is it better to be moving?
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From: Owensville, MO
Year: 1998
Model: Grand Cherokee
Engine: 5.9
I've kind of found that my 242 shifts into FT better by doing the stop-shift-back-up method, but PT shifts on the fly much easier. It's not any harder on the case either way you do it.
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From: Owensville, MO
Year: 1998
Model: Grand Cherokee
Engine: 5.9
so on my 231 when I go into 4 lo or high which can be used "full time" I know I have a primarly part time t-case but I have a full time light that comes on occasionally. When I was on mt aetna a few weeks ago I was going up the trail which was basically just dirt with some decent rocks in part time and I had zero problems, but since winter is coming up I need to figure out how to get into 4x4 full time to cruise the snowy streets.
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Joined: May 2008
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From: Brighton, MI
Model: Cherokee
so on my 231 when I go into 4 lo or high which can be used "full time" I know I have a primarly part time t-case but I have a full time light that comes on occasionally. When I was on mt aetna a few weeks ago I was going up the trail which was basically just dirt with some decent rocks in part time and I had zero problems, but since winter is coming up I need to figure out how to get into 4x4 full time to cruise the snowy streets.
That isn't a good way to verify which case is in it, because someone could have swapped the shifter bezel.