94 jeep wrangler front axle won't engage

Post your Jeep related Tech here.

Moderators: Toyman1994, TallGuy, Tice, Ashman

94 jeep wrangler front axle won't engage

Unread postby bad andy2 » Wed Aug 13, 2008 5:56 pm

hey guys. i am new to YJs, i had a 99 wrangler sport had to sell 3 years ago. now i have a 94 wrangler sahara.the front axle won't engage but the 4x4 light on dash is on. i pulled off the vacuum engager it seems to work. i put in to 4hi and the fork moved. the vac lines are making a sucking noise when they are off. i did change the gear oil. the gears look good to me. (no chips, cracks or metal on the bottom of diff.
thanks for any info. i'v been on the site for a while now. my log in was Bad Andy.
Last edited by bad andy2 on Wed Aug 13, 2008 8:18 pm, edited 1 time in total.
bad andy2
 

Unread postby Brody » Wed Aug 13, 2008 6:47 pm

AUTO 4X4 RIGHT? Could still be in the hubs maybe the splines have striped off on the shafts and are just spinning in the hubs I'd think it makes a noise. I've seen lock outs freeze up and not engage= no noise. I don't know but its a bit hard to read your post you might want to clean it up a bit ;) good luck :thumb:
User avatar
Brody
Supporting Member
Supporting Member
 
Posts: 2212
Joined: Sun Nov 05, 2006 7:19 pm
Location: Arizona

Unread postby archangel » Wed Aug 13, 2008 7:06 pm

a dana 30 underneath a YJ doesnt have any hubs. They use a unitized bearing setup. What I would recommend checking is the vaccum lines to the motor on the axle. If ther eis a pinhole leak it will not provide enough power to the shifter fork. I had a 95 YJ that had the same problem. Turned out to be a bad vac hose.

You could either repair it, or install TJ shafts into the 30. You just need a new seal on the diff side in order to run the one piece TJ shafts.
User avatar
archangel
Supporting Member
Supporting Member
 
Posts: 209
Joined: Fri Feb 03, 2006 10:43 pm
Location: Marana, AZ

Unread postby bad andy2 » Wed Aug 13, 2008 8:28 pm

thanks for the input.
Brody i simplified it. i have a problem typing.

archangel, i did pull the vacuum lines off and they do suck. haha. but i do not know if it is strong enough. there is enough to move the fork from side to side when the engager is off the axle. the vac lines go back to the Xfer case. do you know how to check the lines? should i just by pass the vac lines and put a posi-lock system on it?
bad andy2
 

Unread postby archangel » Wed Aug 13, 2008 9:03 pm

You can eliminate the vaccum lines if you'd like, and do posi lock...I did, before I went to one piece shafts...

As for finding a leak on a vaccum line, I cannot recall where those lines pull the vaccum from, but if they goto the intake manifold somewhere, the simplest way to find a leak is to take a propane torch, turn the gas on, BUT DO NOT LIGHT IT....Pass the UNLIT torch over the lines and when / if you find a leak, you'll hear the motor gain a few RPM's. This tells you you've got a leak.
User avatar
archangel
Supporting Member
Supporting Member
 
Posts: 209
Joined: Fri Feb 03, 2006 10:43 pm
Location: Marana, AZ

Unread postby bad andy2 » Wed Aug 13, 2008 9:10 pm

thanks for the suggestions.
bad andy2
 

Unread postby 4alarm » Wed Aug 13, 2008 9:10 pm

Do you want me to get you back into your old account? PM me and I'll reset your password.
-Josh
'70 Toyota Land Cruiser FJ40 Build-up HERE!
'02 Toyota Sequoia
'08 Infiniti G35
TLCA Member #14566
My pictures: http://www.parrish-family.net
User avatar
4alarm
19 Apr 1980 - 1 Nov 2008
 
Posts: 3757
Joined: Tue Jun 24, 2003 9:17 am
Location: Forever in our hearts and minds..

Unread postby Bad Andy » Thu Aug 14, 2008 8:40 pm

i forgot to add that the front drive shaft is turning when Xfer case is in 4 H/L. help please i don't want to take it to a shop.
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn

Unread postby Brody » Thu Aug 14, 2008 8:52 pm

From whatever one else Has said, I take it your auto 4x4 is in the axle and not the tcase. I had a 86 waggy and it was different it had a viscous coupler in the tcase which engaged the 4x4. Read the thread posted a few below yours it may help but I'm not really sure

http://wheelingarizona.com/forums/viewtopic.php?t=11900
User avatar
Brody
Supporting Member
Supporting Member
 
Posts: 2212
Joined: Sun Nov 05, 2006 7:19 pm
Location: Arizona

Unread postby Bad Andy » Thu Aug 14, 2008 9:05 pm

i have done alot of surfing about this. there are things that found and what i was told here that i will try friday. i will post my findings.
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn

Unread postby jeeperak » Fri Aug 15, 2008 7:22 am

i hated that vac lock crap too, i went with a cheepy cable possi gig,

damn james where ya been brother
User avatar
jeeperak
Boggers
Boggers
 
Posts: 827
Joined: Fri Dec 30, 2005 8:00 pm
Location: sierra vista

Unread postby archangel » Fri Aug 15, 2008 7:34 am

Still here man.... Where the hell you been? You need to get up to T-Town so we can get some wheeling in, or I need to come down there....
User avatar
archangel
Supporting Member
Supporting Member
 
Posts: 209
Joined: Fri Feb 03, 2006 10:43 pm
Location: Marana, AZ

Unread postby 4alarm » Fri Aug 15, 2008 8:07 am

Vacuum line is cheap, replace it and see if it fixes it. If not, you have new vacuum line.
-Josh
'70 Toyota Land Cruiser FJ40 Build-up HERE!
'02 Toyota Sequoia
'08 Infiniti G35
TLCA Member #14566
My pictures: http://www.parrish-family.net
User avatar
4alarm
19 Apr 1980 - 1 Nov 2008
 
Posts: 3757
Joined: Tue Jun 24, 2003 9:17 am
Location: Forever in our hearts and minds..

Unread postby Bad Andy » Wed Aug 20, 2008 4:18 pm

can the X-fer not be working? how can i check?
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn

Unread postby Loco » Wed Aug 20, 2008 6:48 pm

its very unlikely.. But you can shift it from under the jeep to make sure your shift linkage is "linking". :scratching: Its the disconnect.
Kyle Prettyman
Loco Offroad
User avatar
Loco
Boggers
Boggers
 
Posts: 1318
Joined: Sat Nov 15, 2003 4:18 pm
Location: Chandler

Unread postby Bad Andy » Wed Aug 20, 2008 7:35 pm

thanks Loco. i will check that tomarrow. can the linkage be adjusted? can it work its way out of right?
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn

Unread postby Loco » Wed Aug 20, 2008 8:28 pm

Yes it can be adjusted.. No it shouldnt suddenly fail. Honestly Ive fixed dozens of these things and its ALWAYS been the stupid disconnect thingy. The correct way to fix it is a newer model axle shaft on the passenger side and a block off plate for the square hole in the axle tube. This simply eliminates the "disconnect".
Kyle Prettyman
Loco Offroad
User avatar
Loco
Boggers
Boggers
 
Posts: 1318
Joined: Sat Nov 15, 2003 4:18 pm
Location: Chandler

Unread postby Bad Andy » Thu Aug 21, 2008 8:24 am

i will look into it thanks again.
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn

Unread postby grande » Thu Aug 21, 2008 9:03 am

or try this it worked temporarily for me.
Image
64 Scout 80 rock binder in progress.
User avatar
grande
Mud Terrains
Mud Terrains
 
Posts: 596
Joined: Sat Mar 03, 2007 9:15 am
Location: SV, AZ/Ft. Huachuca

Unread postby Bad Andy » Thu Aug 21, 2008 1:21 pm

grande i saw your post i will do that if i can't get it before i go out wheeling. thanks
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn

Unread postby Bad Andy » Thu Aug 21, 2008 7:44 pm

with the diff cover off should you be able to turn the gears by hand? the front drive shaft turns when i turn the spider/ring gears
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn

Unread postby Bad Andy » Sat Aug 23, 2008 6:20 pm

well its not the linkage. i pulled the inside cover off for a better look. it shifts fine sounds fine drive shaft spins when not in 4hi/4lo will not spin in 4hi/lo. so its not the xfer case. thank god. Don (blublaz) said he will help me figure something out. thanks to everyone who helped with seggestions we will prolly try a few things on here.
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn

Unread postby Bad Andy » Fri Aug 29, 2008 6:52 pm

well i finally got under my jeep. it was the vacuum switch not egaging all the way. i am going to use a small hose clamp like grande so i can go out and try my jeep on some rocks. now all i need to do is put in my locker i just got. thanks for all the help.
i have plenty of talent and vision; i just don't give a $hit.
User avatar
Bad Andy
Mud Terrains
Mud Terrains
 
Posts: 585
Joined: Thu Mar 13, 2003 2:36 pm
Location: TocSOn


Return to Jeep Tech

Who is online

Users browsing this forum: No registered users and 1 guest

cron