Post by: dblades on September 05, 2006, 08:04:34 PM
My question is - for general driving should I be using 2WD or part time 4WD? The dealer told me that recent advice suggests the vehicle should be driven in part time 4WD and then use 2WD for parking, car parks etc etc??
Certainly the vehicle doesn't like to tight turn when in part time 4WD so I am assuming (perhaps wrongly) that for general on road use in good weather 2WD should be used?
I's be grateful for any advice you guys can offer
Post by: ponyracer1 on September 05, 2006, 08:14:54 PM
Post by: dblades on September 05, 2006, 08:20:54 PM
I have changed from a Wrangler so I am confused with this part time 4WD... what is it's purpose?
Thanks
Post by: MOCAJ on September 05, 2006, 08:21:47 PM
4wd high- part time in snow etc on the road
4wd low- full time when on the muddy stuff
If its a Jeep dealer that told you that, he should be shot at dawn and as ponyracer said, read the manual.
I run an 02 2.5 crd limited, manual
Post by: Anonymous on September 05, 2006, 08:25:31 PM
Quote from: "xj.jeeper"
:shock:
2wd or full time 4wd for roads (if you have full time) , part time 4wd is for off road use! Get it wrong and you be sorry.
As said... Part time is for loose surfaces only.
2wd or Full Time 4wd for on road.
Part time 4wd or low range 4wd for playing
EE
Post by: Tim on September 05, 2006, 08:52:20 PM
I've never (yet) needed anything other than 2wd on my '04 2.8 CRD Auto but come the winter a bit of 4 full might come into play.
Post by: dblades on September 05, 2006, 09:03:29 PM
Post by: ponyracer1 on September 05, 2006, 09:50:21 PM
Quote from: "Tim"
Yup, I think that 4 part time locks not only the front and rear diffs but also the centre diff, meaning all four wheels will try to turn at the same speed! If you try to use this on a grippy surface like tarmac, you will do serious damage to your Jeep, plus the tyres will be shredded in no time.
I've never (yet) needed anything other than 2wd on my '04 2.8 CRD Auto but come the winter a bit of 4 full might come into play.
HAHA not quite, there are no stock axle lockers that came on jeeps except the rubicon. Only factory LSD in the rear. It has to do with the transfer box, np242 is full time, np231 is part time. Not sure of the difference inside the 242 that lets you run it full time on the street but I know if you do it to the 231 you won't be able to turn and the box will go bang.
Post by: Mike Pavelin on September 05, 2006, 10:05:53 PM
Post by: Tim on September 05, 2006, 10:08:23 PM
Quote from: "ponyracer1"
HAHA not quite, there are no stock axle lockers that came on jeeps except the rubicon. Only factory LSD in the rear. It has to do with the transfer box, np242 is full time, np231 is part time. Not sure of the difference inside the 242 that lets you run it full time on the street but I know if you do it to the 231 you won't be able to turn and the box will go bang.
Now you've lost me. What are np231 and np242?
Had to edit this. AS my Auto has both 4 Full and 4 Part, does it have an np473? :?:
Post by: Mort on September 05, 2006, 10:13:37 PM
Quote from: "ponyracer1"
Quote from: "Tim"Yup, I think that 4 part time locks not only the front and rear diffs but also the centre diff, meaning all four wheels will try to turn at the same speed! If you try to use this on a grippy surface like tarmac, you will do serious damage to your Jeep, plus the tyres will be shredded in no time.
I've never (yet) needed anything other than 2wd on my '04 2.8 CRD Auto but come the winter a bit of 4 full might come into play.
HAHA not quite, there are no stock axle lockers that came on jeeps except the rubicon. Only factory LSD in the rear. It has to do with the transfer box, np242 is full time, np231 is part time. Not sure of the difference inside the 242 that lets you run it full time on the street but I know if you do it to the 231 you won't be able to turn and the box will go bang.
Full-Time 4WD T/C diff open - axles can turn at different speeds, therefore OK on-road. Part-Time 4WD T/C diff locked - axles turn at the same speed, therefore you'll get wind-up on road. Part-Time does not lock the axle diffs.
The clue is on the the T/C shifter and the dash lights. The Full-Time dash light on Jeeps fitted with the 242 T/C shows green, and Full-Time or 2WD positions on the 242 T/C shifter are written in green. Green = OK at all times. The Part-Time dash light is amber, and the Part-Time T/C shifter positions are written in amber too - to denote caution.
If you've got the same T/C settings as your old Wrangler, you should treat it the same. You should have a sticker behind the driver's sun visor that explains when to use each setting.
Post by: Mort on September 06, 2006, 02:19:06 PM
Quote from: "Tim"
Quote from: "ponyracer1"HAHA not quite, there are no stock axle lockers that came on jeeps except the rubicon. Only factory LSD in the rear. It has to do with the transfer box, np242 is full time, np231 is part time. Not sure of the difference inside the 242 that lets you run it full time on the street but I know if you do it to the 231 you won't be able to turn and the box will go bang.
Now you've lost me. What are np231 and np242?
Had to edit this. AS my Auto has both 4 Full and 4 Part, does it have an np473? :?:
Sounds like you'll have an NV242, which is a later version of the NP242. The position of the Part-Time (H) is actually pretty sensible. You'll normally be running in either 2WD or Full-Time 4WD. Placing the Part-Time (H) setting between these ensures that you are never more than one position away from Part-Time 4WD, so you can engage it quickly when you need to, on-the fly.