What kind of 4x4 system is this? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > What kind of 4x4 system is this?

Rockridge 4WD IS Taking Zone Offroad Suspension Lift Kits ZONE 4.25" combo lift for TJ available at Rockridge4wG2 Disc Brake Conversion Kit for Jeep Wrangler YJ TJ LJ Ch

Reply
Unread 03-30-2010, 07:13 AM   #1
WoodiE55
Registered User
2004 WJ 
 
Join Date: Sep 2004
Location: Lexington, KY
Posts: 74
What kind of 4x4 system is this?

The Jeep is a 2000-2001 Grand Cherokee, the owners manual is missing but the center console has the following setup:

2WD
4WD Part Time
4WD Full Time
4WD Low

What 4x4 system is this?

Also, is 4WD Part Time safe to drive on the road - wet or dry or should it only be used off road?

__________________
04 Grand Cherokee Special Edition, 4.7 V8, QTII
WoodiE55 is offline   Reply With Quote Quick reply to this message
Unread 03-30-2010, 07:26 AM   #2
charlesshoults
Registered User
1995 ZJ 
 
Join Date: Mar 2007
Location: Sidney, NE
Posts: 172
Selec-Trac

This sounds like the Selec-Trac system in the NP242 transfer case.
NP242 - JeepForum.com Community Jeep Wiki
* 2WD or 4WD Full Time (2WD or 4 FULLTIME) - In either position, the vehicle may be operated on all road surfaces. In 4WD Full Time, Select Trac offers better traction when roads are wet, snow covered or icy. Use Selec-Trac 4WD Fulltime year-round (full time) if you wish. Comparable to what other vehicles call "all wheel drive."

* N Position (Neutral)- In this position the axles are disengaged from the powertrain. The vehicle may be towed without removing the propeller shafts. Place an automatic transmission in Park or a manual transmission in gear after the N position is engaged.

* 4WD Part Time High Position (4 PARTTIME) - This position provides 4WD for occasional use in low traction driving conditions such as snow, dirt etc. NOT FOR USE ON DRY PAVEMENT as transfer case damage may result.

* 4WD Lo Position (4 LO) - This position provides 4WD for occasional use when *OFF-ROAD* driving conditions require low speed pulling power. NOT FOR USE ON DRY PAVEMENT as transfer case damage may result.
charlesshoults is offline   Reply With Quote Quick reply to this message
Unread 03-30-2010, 07:39 AM   #3
WoodiE55
Registered User
2004 WJ 
 
Join Date: Sep 2004
Location: Lexington, KY
Posts: 74
Thanks so much for the quick and detailed response.
__________________
04 Grand Cherokee Special Edition, 4.7 V8, QTII
WoodiE55 is offline   Reply With Quote Quick reply to this message
Unread 03-30-2010, 07:42 AM   #4
EisBlade
Web Wheeler
 
EisBlade's Avatar
1999 WJ 
 
Join Date: Mar 2005
Location: Raleigh, North Carolina
Posts: 1,172
Quote:
Originally Posted by WoodiE55 View Post
The Jeep is a 2000-2001 Grand Cherokee, the owners manual is missing but the center console has the following setup:

2WD
4WD Part Time
4WD Full Time
4WD Low

What 4x4 system is this?

Also, is 4WD Part Time safe to drive on the road - wet or dry or should it only be used off road?
edit: Nice and quick reply, charlesshoults. lol I was off in Google land pulling down all this for him.

It looks like its a Selec-Trac, possibly with the NP242 transfer case.... You can find the gearing on the differential bolt tabs. In 4WD Full Time mode you can drive it any time on any surface like all-wheel drive...rain, sleet, mud, etc. For 4WD Part Time mode you'll find that when selected, there is an indicator light that comes on on the dash. This is because this mode is important and that indicator light should be considered as a WARNING....in that, Part Time should only be used for that - part of the time, those times when you are only on a slippery surface such as off-roading in mud, snow, etc. The TC locks front and back as one and the wheels will hop or lock up if on the highway. Being on a slippery surface allows driveline stresses to relieve themselves as is needed.

Selec-Trac, look it up:
1) Jeep four wheel drive systems - Wikipedia, the free encyclopedia
Though you'll read that the Selec-Trac was discontinued in favor of the Quadra-Drive II, the NV242 transfer case offers more gear modes and is the preferred. The Quadra-Drive II WJ's came equipped with axles having vari-lok differentials, a type of locker activated by the buildup of pressure from a spinning tire. I upgraded my axles to this and find them to be...not worth the money, and would put Aussie's in if I had to do it all over again.

2) Jeep - 4x4 Basics - 4x4 Systems by Vehicle - 4WD SUVs
Not a bad read, and helps explain a lot.

3) Jeep Select Trac NP 242 Transfer Case Information
Great article. Poke around for more info...

Hope that helps!
__________________
.
JT
Harley-Davidson Touring Group [35K members]
The largest forum on Facebook for Road King and larger touring models.


Disclaimer:Not responsible for men of weak character.
EisBlade is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.