Rushin

Figured one problem now I have another one. It seems like this happens after my lift kit. Today I decided to check if my Part-time 4x4 works. So I pulled over put the shifter in neutral and shifted to 4H. Put it in drive, started to accelerate and noticed that as soon as I got on the gas Part time light went off. And when I let out the gas it came back on p. If I was really light on throttle it was on.

I got under the car and in 2wd the front drive shaft turned freely and in 4h it was locked. So the issue is not in the transfer case.

I am thinking it's a vacuum problem? What role that vacuum play in the 4wd on the jeep? I noticed that I have two little vacuum hoses going to the pass side of the axle, what is that for.

Sorry for my noobness i just never had a 4x4 vehicle before.

cfd_2214

There is a vacuum disconnect on the front axle on the passenger side prior to I believe its 1995. The vacuum lines engage and dis-engage the half shaft on the passenger side. There are two fixes for it either do some research for a homemade posi-lock, or convert the front axle with a 95 or newer passenger side shaft that requires a new seal. The reason I know is I am going thru the same deal with my 87. Once I find a link or find the part numbers I will let you know.

Hyper

i just got a 90 xj jeep never had a jeep before what is the part time 4x4 for???? when theirs 4x4 high right next to it?

cfd_2214

here is the link for the homemade posi-lock

http://www.jeepforum.com/forum/f12/h...ite-up-595515/

Rushin

Great write up on the homemade posi lock. Thank you. After a little bit of research I found the issue. I had no idea how the whole system works but I figured it out now. I am going to go to a junk yard and pull myself another vacuum disco plate and play with that. See if I can make myself a home made posi too, before it starts snowing:-/.

Rushin

Figured it out. Bunch of crap got stock in theactuator motor on the axle. Cleaned the vacuum nipple and replaced warn out tubes with some rubber hoses. Works great!

cumo000

Posi-loc is worth the money. You should consider it.