Full Time vs. Part Time FWD - JeepForum.com

 
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post #1 of 7 Old 12-18-2013, 10:11 AM Thread Starter
Tumbleweed1954
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Full Time vs. Part Time FWD

I'm new to Jeeps and am wondering under what circumstances you might use FULL TIME 4WD? I figure when it is raining or when there is light snow on the highway. Any other conditions for using it?

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post #2 of 7 Old 12-18-2013, 10:27 AM
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You can use Full-Time any time. Towing, dry pavement, dirt roads, gravel, wet leaves, snow, ice, sleet, rain, cow pastures, etc.

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post #3 of 7 Old 12-18-2013, 10:27 AM
michiganmaveric
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You can use full time any time and under any conditions. It is part time you have to be careful with. Never use part time on dry/rainy pavement conditions as you could tear up your xfer case/axles. Part time must have slippery conditions, I.E. snow,ice,sand,gravel to work properly.

Previous Jeeps: 84 CJ7 (A True Jeep), 2000 XJ (163,000 Miles/Totaled (Pictures of wrecked Jeep in gallery)), 2004 WJ (parting out die to major electrical issues)

If you don't have time to do it right the first time, how do you have time to do it over.

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post #4 of 7 Old 12-18-2013, 10:35 AM
KayCeeJeep
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Full time is exactly that, you can use it full time without concern. Works great for inclement weather or light snowfall on the roadway, I especially like it for my wife since she can drive the Jeep anywhere and not get stuck. The part time only confuses her no matter how many times I explain it, and I don't want her messing with the 4wd shifter anyway!
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post #5 of 7 Old 12-18-2013, 09:35 PM
wjjeep19
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Wow Im glad I read this. I didnt know you could use 4 full time on dry pavement. I thought that would mess up the xfer case just like 4 part time. Can you explain why you can use 4 full time? Since its 4 full time its giving power to the front wheels. So by turning sharp on dry pavement wouldnt that cause the front wheels to be really grabbing the road and result in messing up the xfer case? Ive had my jeep for awhile but never thought of it. I just applied it to my 89 Bronco and 77 RamCharger on dry pavement.

Like I said please explain, I love learning.

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post #6 of 7 Old 12-18-2013, 10:01 PM
Len455
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So part time dosent blow up because when we use it off road we get enough slip from the dirt sand etc to not create enough bind in the driveline to do any harm. In a full time system such as some cherokees escalades and subarus we get around the issue of the driveline bind through a third differential just after the transfer case. This allows the slip onroad to not build up any bind. I believe that this can also be bad off road though because just like lifting a wheel and losing traction the same thing can happen between the front and back axles. If you search up subaru drivetrain diagram youll get a decent diagram explaining.
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post #7 of 7 Old 12-19-2013, 04:09 AM
michiganmaveric
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Quote:
Originally Posted by wjjeep19 View Post
Wow Im glad I read this. I didnt know you could use 4 full time on dry pavement. I thought that would mess up the xfer case just like 4 part time. Can you explain why you can use 4 full time? Since its 4 full time its giving power to the front wheels. So by turning sharp on dry pavement wouldnt that cause the front wheels to be really grabbing the road and result in messing up the xfer case? Ive had my jeep for awhile but never thought of it. I just applied it to my 89 Bronco and 77 RamCharger on dry pavement.

Like I said please explain, I love learning.
There is a differential in the xfer case that allows this. Read about the 242 case in the link posted above in post #2

Previous Jeeps: 84 CJ7 (A True Jeep), 2000 XJ (163,000 Miles/Totaled (Pictures of wrecked Jeep in gallery)), 2004 WJ (parting out die to major electrical issues)

If you don't have time to do it right the first time, how do you have time to do it over.

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