husky250rider
NAXJA Forum User
- Location
- St Louis MO
ok u guys might think i am retarted but i just got my xj yesterday and i dont know how to turn on full time 4wd every time i put it in 4h or 4l it says part time can someone help me
We need to know what 4WD system you have?husky250rider said:ok u guys might think i am retarted but i just got my xj yesterday and i dont know how to turn on full time 4wd every time i put it in 4h or 4l it says part time can someone help me
langer1 said:We need to know what 4WD system you have?
5-90 said:Well, that depends...
How many "shift" positions do you see on the tcase shifter bezel?
If it's 2HI - 4HI - N - 4LO, you don't have "full-time" 4WD, and you'd best not leave it in 4WD while in the dry or on pavement
If it's 2HI - 4PT - 4FT - N - 4LO, then you do have the "full-time" setting, and you can theoretically leave it in "full-time" 4WD indefinitely (but you really shouldn't - if nothing else, you'll see the hit in fuel mileage.)
There were at least two transfer cases in production at any given time - with the main two after 1987 being the NP231 (w/o 4FT) and the NP242 (w/4FT.) The NP231 is far more common - I've only seen the FT option (NP242) in "Limited" Cherokees - but I could be wrong.
If you can't tell from up top (say, the bezel is missing or has been incorrectly replaced,) it's still possible to tell. Get under the truck, and look at the transfer case/back side/opposite the front output shaft. There should be a small (about 2") round metal tag with a screw thru the centre. You might have to clean it (it's silver with a red "tooth" edging,) but it's an ID tag for the transfer case and it should read, up top, either 231 or 242 (may or may not have a "J" after it, for "Jeep" production.)
Let us know what you find.
5-90
(You're not stupid, just inexperienced and untrained. Give us time, we'll warp your mind...)
5-90 said:If it's 2HI - 4HI - N - 4LO, you don't have "full-time" 4WD, and you'd best not leave it in 4WD while in the dry or on pavement
husky250rider said:it has 2h n 4h 4l now i understand. thanks alot for the info
5-90 said:- I've only seen the FT option (NP242) in "Limited" Cherokees - but I could be wrong.
sjx40250 said:Part time locks the TC between the front and rear drive shafts - 50/50 split. FT is open (40/60?).
sjx40250 said:Part time locks the TC between the front and rear drive shafts - 50/50 split. FT is open (40/60?).
Zuki-Ron said:OK I get the first one, they are locked together.
The second one I have trouble swallowing. With Full time, there is a differential, sort of like in an axle. The way I understand it, if both axles have a good grip, the distribution should be 50/50. If say the rear axle looses traction, more power will be sent to the back and less in the front, and visa versa. If the front looses traction, more power goes to the front, and less to the back.
XplodJeepster said:I asked the same question about the part-time thing. it was amusing.
either way - the hubs lock and they lock in real hard while in 4hi - of course thats only after you roll around a bit.
the 4lo hub locking occurs a little quicker, you can feel it once it does