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Old 02-15-2012, 02:52 PM   #1
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Part Time indicator light

A friend just got a 2001 Wrangler and asked me how can he put the Jeep in 4w high without the part time feature? Any help?

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Old 02-15-2012, 03:23 PM   #2
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There is no part time "feature" Wranglers are part time 4WD because they are not in 4WD until you put them there. Cherokee's are full-time 4WD. They have a center differential and 4WD is always engaged.

If the transfer case lever is not pulled, it's 2WD, shift it up to 4H and it's 4WD. That's it, nothing fancier.

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Old 02-15-2012, 03:29 PM   #3
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Cherokees are not full-time 4WD...my wife has a 1994 Grand Cherokee Limited, and it's 2wd/4wd part-time/4wd full on the shifter lever.
Both my sons own cherokees, 1 is a 94, the other a 99, and they don't have the 4wd part time-they have 4wd low and high besides 2wd.
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Old 02-15-2012, 03:36 PM   #4
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The jeeps that used an np242 transfer case had the full-time 4wd function, along with high and low lock
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Old 02-15-2012, 04:41 PM   #5
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Part Time light

Quote:
Originally Posted by Gary parkinson View Post
A friend just got a 2001 Wrangler and asked me how can he put the Jeep in 4w high without the part time feature? Any help?

I'll find out exactly what model he has. All I know is that he said it was a 2001 Jeep Wrangler, 5speed, 4 cylinder and said that when he puts it in 4W drive, the part time light comes on and he wants it in 4w full time with no part time light???
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Old 02-15-2012, 05:31 PM   #6
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part time = np231 (part time here refers to no hard surfaces)
full time = np242 (awd) optional in cherokees and grand cherokees
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Old 02-15-2012, 05:32 PM   #7
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Quote:
Originally Posted by Gary parkinson

I'll find out exactly what model he has. All I know is that he said it was a 2001 Jeep Wrangler, 5speed, 4 cylinder and said that when he puts it in 4W drive, the part time light comes on and he wants it in 4w full time with no part time light???
As already explained, full time 4wd (awd) is not a feature on any Wrangler. 4wd should not be engaged on dry pavement. Back in the 70's some CJ's had a full time system. It was called quadra-trac and it was horrible.
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Old 02-15-2012, 07:52 PM   #8
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Quote:
Originally Posted by Gary parkinson View Post
he wants it in 4w full time with no part time light???
Not even possible on a Wrangler. (as has been stated previously)
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Old 02-15-2012, 09:59 PM   #9
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Quote:
Originally Posted by NHrubicon View Post
Cherokees are not full-time 4WD...my wife has a 1994 Grand Cherokee Limited, and it's 2wd/4wd part-time/4wd full on the shifter lever.
Both my sons own cherokees, 1 is a 94, the other a 99, and they don't have the 4wd part time-they have 4wd low and high besides 2wd.
We're both right, depends on the year. Our 04 is full time, when we had a 93 it was part time.
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Old 02-15-2012, 10:13 PM   #10
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Originally Posted by cavsvet74 View Post
Not even possible on a Wrangler. (as has been stated previously)
its possible on a wrangler, you just have to swap in an np242 transfer case..
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Old 02-15-2012, 10:34 PM   #11
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My light says part time also and I have a 2000 Sahara. But I know it. Even when it is in 4 lo or 4 hi.
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Old 02-16-2012, 01:35 PM   #12
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The 4wd in a wrangler is a part time system.

"Part time" means 4wd is only meant to be engaged on slippery surfaces or when more traction is needed (snow, mud, rocks, ect..). It is not meant to be driven with 4wd engaged on dry roads because there is no differential in the transfer case meaning that the front and rear drive shafts are forced to turn at the same speed. A loose surface is needed to allow smooth turning or else the drivetrain will bind.

A full time system has a differential in the transfer case that allows the front and rear drive shafts to turn at different speeds. This allows for smooth turns that will not cause the drivetrain to bind because the front and rear drive shafts are allowed to spin at different speeds.

The wrangler does not have a full time transfer case. It comes with a part time transfer case only. That "part time" light simple means the 4wd part time transfer case the wrangler has is engaged. There is no "full time" selection, only "part time" in a wrangler.

Hope this clears it up!
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Old 02-18-2012, 10:29 AM   #13
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Part Time indicator

Thank You, now I understand. I think that most of my confusion came from the fact that my 2006 jeep wrangler does not have a "Part Time" light, only a 4WD light.

Thanks again

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