View Full Version : 4x4 wont engage ?

06-20-2004, 11:13 AM
I just bought a 89 yj 2.5L with 31's with 160k,
when I try to engage 4 high she makes a mean clunking sound and will not engage ?
the front drive shaft has a bit of play, I just changed the diff fluid and the transfer case fluid.
The front diff fluid was clean and the gears look fine?

Any help would be awsome.


06-20-2004, 12:35 PM
its a jeep. nuff said

79 F150 custom
solid front on 4" BDS coils
solid rear on 4" arched leafs.
35 tsl boggers
351 m
np 205 T case
np 435 tranny

06-20-2004, 01:40 PM
Does that year of yj have the vacuom actuated front diff???????????

06-20-2004, 02:45 PM
yeah they do have the vacum front diff

check your u-joints on the front d-shaft and axle joints aswell

it's light it's fast it's powerful

everything a chevy isn't

06-20-2004, 02:48 PM
All YJ's have a vacuum diconnect. The fork inside the
disconnect is known to wear out not allowing it to
enguage all the way. The clunk you are hearing is probably
the fork jumping off the inner right side shaft. New
forks are available for a reasonable price and are fairly
easy to change. Good luck[8D]

06-20-2004, 03:59 PM
i was going to post its a heep but somebody already beat me to it[9][9]

06-20-2004, 05:57 PM
Didnt you test drive it an put it in 4x4 before buying it?? or did this happen later.

06-21-2004, 05:58 AM
doesnt matter what you buy to help it,,, it is still a jeep,, no matter how ya lok at it...... haaahaaaa

Support your local red and white.

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06-22-2004, 01:27 PM
Just do yourself a favor since its a new (to you) vehicle , an check all the simple stuff first before throwing in a new T-case or whatever.

06-23-2004, 03:38 PM
Thanks for all the helpfull replys and screw off to the rest...
im going to do some wrenchin this weekend.

06-26-2004, 10:07 PM
is it an auto??? if it is,, put the tranny in nuetral,, then shift transfer case,, if it is std,,, put in nuetral,, with foot on clutch,, give it a try.....and let me know...

Support your local red and white.

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