bigdhall

My 99 wont shift into 4Lo....actually lets put it this way it will shift into 4Lo however the front wheels wont engage, I think it is the t-case is my assumption correct?? It runs in 4 wheel all-time and it is supposed to engage when the rear wheels slip and they dont not engage that way either. Any suggestions??
thanks-

98zJeff

im not sure but does that jeep use a vacumm to engage the front axles if so check the hoses on top of the axle housing

bigdhall

I think it does...I will check the next time I am out to work on it....
thanks-

98zJeff

no problem had that problem with my yj

Bustedback

No vacuum actuator on any Grand Cherokee front axle.

98zJeff

good to know i now have a 95 zj

bigdhall

that is nice to know.....any other suggestions??
-thanks

ol"blue

Welcome to CF.
How long have you owned it? Have you looked underneath it? It could be the transfer case linkage is loose, disconnected, or needs adjusting. It could be internal t-case damage. It could be that the front drive-shaft has been removed.
This describes the various 4WD systems offered on the WJ. >http://www.wjjeeps.com/tcases.htm

bigdhall

I have owned it for 2 1/2 yrs, and I have looked underneath a few times b/c the 4x4 problem has been bugging me lol.....I will look closer at the linkage next time I crawl underneath it.
-Thanks

bigdhall

Oh and the front drive is still intact as well.

ol"blue

Sounds like you have the Quatra-Trac II system, with 4 HI-N-4 LO positions on the range selector. If the front wheels don't pull at all, even in 4 HI, it's probably internal damage in the t-case or the front axle.
My '04 WJ has this system and when you take off hard the rear tires spin briefly then the front tires grab. In the grass or dirt all 4 tires will spin.

bigdhall

thats exactly what doesnt happen....and that is the system that I have.....thank you for the help I will have the t-case looked at and the front axle if the t-case is good.
-thanks again

ol"blue

If it's the t-case it would probably be a lot cheaper to replace it than to have yours rebuilt. The NV 247 t-case should be the same from '99-'04 I would think. You might find a low mile used one for cheap.

doe4

I was haven the same issue with mine awhile back then a buddy of mine told me to check the Transfercase fluid level.Sure enough there wasnt enough in there so I added some and I started workin again. My friend told me it engages with the Fluid and if theres not enough it wont engage he also said i was lucky it didnt burn up. Guess i got lucky But check the fluid level in the T-Case hope your as lucky as I was. I have the same Tcase 247 try it out maybe even change the old out if there is fluid in there.

bigdhall

ok thank i will definitely check that first....school is almost over so I will have time to check..
-thanks for all the help