View Full Version : 93 yj transfer case

rat trap
07-08-2012, 10:23 AM
I ok i will try and explain the issue i am having.

It started a few weeks ago i was having trouble engaing 4x4 . So i did the obvious check out all vacuum lines and the actuator and vacuum control switch on transfer case every thing seems to be working fine. When i put the jeep into 4 lo or 4 hi the front axel locks like it is suppose to but the transfer case dose not spin the drive shaft. I have checked the chain is still in place every thing seems to be in working order. It has me stumped
maybe it is the shift fork or something i dont know so if any one has any ideas or has had this issue before let me know [cheers] [cheers] [cheers]

Or if someone has a transfer case that will fit i can just replace it let me no what you would want for it :confused0006:

07-08-2012, 10:57 AM

07-08-2012, 11:07 AM

Strong words for only having 1 post.....drama

07-08-2012, 11:39 AM
What tcase u got? I have a spare

07-08-2012, 01:22 PM
U sure it's ingaging all the way? Engage from inside then go underneath it with a wrench and see if it's actually ingaging all the way! U might just need to adjust your linkage

rat trap
07-08-2012, 08:47 PM
ya im sure the axel is engaging . When i put my jeep on the hoist lift it up in 4 lo and spin the front drive shaft it just spinns freely as if it is in neutral.

rat trap
07-08-2012, 08:48 PM
tryed adjustin shift linkage to didnt help

rat trap
07-08-2012, 08:49 PM
I am going to drop the t case tomororrow and crack it open see if i can c whats wrong.

I am not sure what t case it is yet but i will let you no i might need to buy that one of you big orange 440

07-08-2012, 10:20 PM
You getting proper vacuum pressure to engage that crappy fork in the diff

rat trap
07-08-2012, 10:54 PM
You getting proper vacuum pressure to engage that crappy fork in the diff

Im going to add a vacuum storage canister and see if that helps [cheers]

07-09-2012, 09:13 AM
Really??? It's a np231 and for the most part they are bulletproof (minus the slip yoke). Remove linkage, engage by hand. Easy breezy! Had a similar problem was mounts and linkage.

07-09-2012, 10:11 AM
Strong words for only having 1 post.....drama

I believe its his brother just giving him a hard time as WJaye just bought a new chevy truck.

rat trap
07-09-2012, 06:14 PM
i am going to give it a shot thanks guys

rat trap
07-09-2012, 07:41 PM
well today i tried to shift transfer case by hand it didnt make any difference still not engaging front drive shaft. I also installed a vacuum canister and still know luck.
The axel seems to be locked in when i spin the front drive shaft the front wheels turn. the transfer case go's into low range but still no movement on the drive shaft.

rat trap
07-09-2012, 08:31 PM
if someone is available this week sometime that knows jeeps pretty well and could give me a hand figuring this out or even fixing it. I have some beer and money to through out there. pm me if interested.. I have a hoist in my garage so its not like you will be laying on the ground....[cheers]

07-09-2012, 08:59 PM
The little plastic pieces are broken so its not shifting the front output into gear:dontknow:

07-09-2012, 09:53 PM
Yeah I figured I would give my brother a hard time with the first post

07-10-2012, 10:39 AM
dodge uses the same transfer case np231 in the 1/2 ton rams, my old truck blew two. The slip yoke walked the tail shaft into the shift fork and snapped it, when i went to replace it, it was a new transfer case had manufacturer stamp on it, called em they said out of warrenty it was done at like 90,000 kms that time and a couple years prior). It has 140,000 kms when it snapped on me.

Id guess its the same thing, just not as common on jeeps cause 6 cyl and less weight.