92 YJ Question - Pirate4x4.Com : 4x4 and Off-Road Forum
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > General Tech > Newbie General 4x4 Discussion

Share Thread Tools Display Modes
Old 02-20-2003, 10:05 AM   #1 (permalink)
Registered User
Join Date: Feb 2003
Member # 17204
Posts: 0
Send a message via Yahoo to XYZ
92 YJ Question

Hello i just joined the board i have been lurking around debating if i was ever going to post here. reason being is that my jeep is stock as of right now and i only plan on doing a 4 inch SUA lift and running 33's (maybe a SOA sometime down there road) and it seems that most of you guys are hardcore. And know your sh!t inside and out so with that being said here is my Question
I just replaced my Front Axel motor (vacuum Actuator) on a 92 Jeep with the I6. before I replaced it, when I put the lever in 4 high it would do nothing ( no light) and I would be able to move the level from 2 high to 4 high with out the clutch being pressed in and no grinding or anything

now that I replaced the Vacuum thing the light will come on and if I do not press the clutch and move the lever up it will grind ( I did this only once and not hard just to see if it would grind) but it just does not feel like it is in 4high I had one of my rear tires (passenger side) on a patch of ice and that tire would sit there and spin I gave it more gas it just sat there and did a one wheel wonder( i was told that the jeep has the limmited slip rear end) I then got out of the jeep and walked behind it with the tire just Turing but as soon as I put the jeep in 4 low it backed it self right up the little hill on to the pavement. so I still do not think my front is locking up right with the way the design on the inside it looks like if the light is on then the front would be locked because the shift fork has to move the collar over in order to press the button in to turn the 4x4 light on. another thing is when I take it out of 4 high I can hear a whooshing sound but as soon as I put it in to 4high it goes away and idea what is causing this? thanks for any inof you can provide
XYZ is offline   Reply With Quote Quick reply to this message
Old 02-20-2003, 12:14 PM   #2 (permalink)
Registered User
Join Date: Nov 2002
Member # 15250
Location: Kenosha WI
Posts: 166
Check your vacuum lines that go to the front axle Actuator It sounds like you might have one that is either leaking or has come loose . The other thing you need to insure is that when you connected your vacuum lines back up to the actuator did you switch them (reverse them)?
Born to Fabricate!!

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jeepinblackdog is offline   Reply With Quote Quick reply to this message
Sponsored Links
Old 02-20-2003, 12:31 PM   #3 (permalink)
Registered User
Join Date: Feb 2003
Member # 17204
Posts: 0
Send a message via Yahoo to XYZ
i did not reverse them it is just a black rubber 2 prong looking things kind of like a upside down U i just lifted it right off and then put it right back on. i also hooked that tube thing to the new vacuum motor before i installed it and had my wife shift it from 4 high to 2 high and the bar slide in and out like it should. and then i put the motor in half way ( so i could still see the shift fork and the collar) and the fork moved the collar over towards the Driver side when in put in 4 high and then back to the driver side when in 2 high. the wooshing sounds kind of like mud tires on the pavment with about and 3 or 4 second delay in between the wooshing. i checked for Vac leaks when i was putting the new motor on and did not find any
XYZ is offline   Reply With Quote Quick reply to this message
Old 02-20-2003, 01:57 PM   #4 (permalink)
Registered User
Robert's Avatar
Join Date: Jun 2000
Member # 1050
Location: West Sacramento, Kalleyforneeya
Posts: 1,805
Send a message via Yahoo to Robert
Just for shits and giggles, are you sure your t-case is engaging the front axle in 4hi????? You could very well have some internal problem with the t-case.
While sounds like you are losing vacuum, remember to check the basics. The whole, grind, not grind thing sounds BS to me.
The NP 231 transfer case (which is what you have, doesn't sound like you would know that) is synchronized to allow full speed engagement of 4hi. But like a transmission, you should still unload torque to it before shifting it, either through the clutch pedal or by placing the tranny in neutral.

P.S. If your Jeep does have a limited slip, it is most likely a factory Trac Lok. They are about as worthless as an open diff, as you learned in the ice.
Ask me anything about a Cummins, I stayed at a Holiday Inn last night.
Robert is offline   Reply With Quote Quick reply to this message
Old 02-20-2003, 02:12 PM   #5 (permalink)
Registered User
Join Date: Feb 2003
Member # 17204
Posts: 0
Send a message via Yahoo to XYZ
Ok how would i check to see if the T-case is engaging the front Axle? Jack it up so all 4 tires are off the ground and put it in 4 high and see if a front and rear tire move? if it is the transfer case not engaging the front what would i have to replace?
XYZ is offline   Reply With Quote Quick reply to this message
Old 02-21-2003, 08:07 PM   #6 (permalink)
Registered User
Join Date: Oct 2002
Member # 14155
Location: Modesto, CA
Posts: 1,472
Send a message via Yahoo to JJSBADYJ
you could put your tcase in 4hi and jack up the rear end only. If it does engage correctly you should be able to move forward with the rear end raised. Dont try something crazy like side step the clutch at 5000 rpm but just let the clutch out slowly at idle and see if it moves. MAKE SURE NOBODY OR NOTHING OF VALUE IS IN FRONT OF YOUR RIG!!! good luck
JJSBADYJ is offline   Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the Pirate4x4.Com : 4x4 and Off-Road Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.


Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -7. The time now is 08:40 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.