79 Cherokee Chief TRASNFER CASE HELP - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Full Size Jeep Forum > 79 Cherokee Chief TRASNFER CASE HELP

Rockridge 4WD IS Taking Zone Offroad Suspension Lift Kits BLACK FRIDAY SPECIALS!! You asked, we deliver!Rough Country Lift Kits and Parts!

Reply
Unread 12-06-2012, 03:22 PM   #1
79chiefs
Registered User
1988 XJ Cherokee 
 
Join Date: Dec 2012
Location: Lillington, NC
Posts: 984
79 Cherokee Chief TRASNFER CASE HELP

Ok... so I have been working on a 79 cherokee chief I found in the woods and bought. I am in high school so I cannot afford to do a lot i bought some tires for it but 2 were bad. I put them on to replace two that were originally on it and wouldnt stay up. I know I cannot drive it with two different size tires on it, because it is the Full time Quadra-trac High/Low range, and it may burn out a differential. I took the front drive-shaft out to drive it but now it will not lock into any gear, and grinds when I put it back to park. I read i needed to put it in E-drive, but I do not know how, and I also looked at the wiring diagram and found that I do have the wiring for it on the t-case, but I think the bulb was out of the spot in the dash, when I took it out to replace some gauges, also I know it is supposed to be a orange wire which is also the color of other light bulb wires, and I found one cut under my dash. I do not know which wires go where, for lighting, also do not have lights to light my dash up when i pull the headlight switch. next I looked at the vacuum diagram and found on vacuum hose just dangling coming from the engine bay with one other. The e-drive diaphragm has the two vacuum hose hook ups on the t-case, but they only have on hose that connect the two hose hookups. I need to know how to put it in e-drive and how the vacuum hoses are supposed to go. It has and engine swap from 360 to chevy 350(79-year), with th400 trans, and Full time Quadra-track with high/low range. PLEASE HELP

79chiefs is offline   Reply With Quote Quick reply to this message
Unread 12-06-2012, 05:54 PM   #2
jeepdaddy2000
Registered User
1971 CJ5 
 
Join Date: Jan 2002
Location: Secret Squirrel hideout, afghanistan
Posts: 6,256
The E drive is vacuum operated through a switch in the glove box. You will want to inspect the vacuum lines going from the engine through the switch, down to the vacuum motor on the top of the t case.
If everything is intact, start the engine and rotate the switch to see if the bulb comes on (e drive engaged). If so, you are in business. If not, place the transmission in gear and see if the rig moves. If it does, then the bulb is most likely out. If not, or it moves very slowly (do not drive it this way or you will destroy the ls in the t case), then put the trans in P and check for vacuum at the vacuum motor to see if the switch is working. Check both sides, since sometimes they get switched. If nothing, then work your way back till you find the leak. If you have vacuum and the e drive won't engage, then the vacuum motor may be bad. Try getting it to move with a vacuum pump. You can pull the motor and move the arm by hand if you have to in order to get the rig moving.
If all you are just moving the rig a short distance, reinstall the driveline. It won't hurt to drive it in poor traction conditions or for a short ways on pavement as long as the tires aren't ridiculously different in size.
Here is a pict of the motor and cover,

Here is a schematic of the vacuum lines.
jeepdaddy2000 is offline   Reply With Quote Quick reply to this message
Unread 12-07-2012, 02:57 PM   #3
79chiefs
Registered User
1988 XJ Cherokee 
 
Join Date: Dec 2012
Location: Lillington, NC
Posts: 984
I understand what i need to do, but i have no glovebox behind the glovebox door just bunches of wires, also no switch, but just a sticker telling me how to do it, also when i took the dash out to replace bulbs, i noticed a cut orange wire, and not light ion the e drive slot. Under the jeep there is a vacuum line not connected, and a vacuum line connecting the two vacuum hookups on the diaphragm, i was going to try to connect that vacuum line directly to the activate side of the diaphram
79chiefs is offline   Reply With Quote Quick reply to this message
Unread 12-07-2012, 03:21 PM   #4
79chiefs
Registered User
1988 XJ Cherokee 
 
Join Date: Dec 2012
Location: Lillington, NC
Posts: 984
Also can you tell me what exactly i can do with e drive, because i have heard a lot, like it disengages the front driveshaft because that is what i want because i have the drive shaft out to be able to drive with two different size tires till i can afford to get a whole set, b/c i do not want to burn up and of the drivetrain being it is full time 4wd or can i just stay in normal to do this or do i need to be in e drive to drive without the front driveshaft
79chiefs is offline   Reply With Quote Quick reply to this message
Unread 12-07-2012, 09:20 PM   #5
jeepdaddy2000
Registered User
1971 CJ5 
 
Join Date: Jan 2002
Location: Secret Squirrel hideout, afghanistan
Posts: 6,256
You can drop the front driveline and safely drive the rig with the e drive in the emergency mode. This will cause no real problems unless you have an LS in the rear diff (a large difference in tire size side to side will cause the LS to work). You will also want to stay off the throttle, as only half of the driveline will be pulling.
You can not drop the front driveline and drive without engaging the e drive. If you do you will destroy the LS diff in the t case.
If you apply vacuum to the engage (inner) side of the motor, it should engage the e drive. You can do this by connecting the vacuum hosed directly from the manifold to the vacuum motor or with a vacuum pump.
jeepdaddy2000 is offline   Reply With Quote Quick reply to this message
Unread 12-26-2012, 08:25 PM   #6
79chiefs
Registered User
1988 XJ Cherokee 
 
Join Date: Dec 2012
Location: Lillington, NC
Posts: 984
I tried to put the vacuum hose directly on it but no difference also when i try to drive with the dhaft out it does not want to move, also what is LS mean
79chiefs is offline   Reply With Quote Quick reply to this message
Unread 12-26-2012, 09:10 PM   #7
RockRollin
"Positive.....I think"
 
RockRollin's Avatar
1990 FSJ Wagoneer 
 
Join Date: Apr 2012
Location: Grand Haven Mi, USA
Posts: 1,095
Limited Slip(front to rear). I believe the e-drive locks it in place. You may have to remove the vacuum motor from the t-case and get it freed up and moving easily. Check the diaphragm for leaks.
RockRollin is offline   Reply With Quote Quick reply to this message
Unread 12-27-2012, 02:11 PM   #8
79chiefs
Registered User
1988 XJ Cherokee 
 
Join Date: Dec 2012
Location: Lillington, NC
Posts: 984
How do I check for leaks i just finished putting the driveshaft back in(finally had some time to), and i made sure the vacuum hose from the engine bay is hooked to the apply side, but i am waiting for my battery to charge a bit before i start it, since I cannot seem to find a battery that does not die when in this jeep. I have redone wiring and it does not die as quickly but still. Also how do i know if my e-drive is engaged, because as i mentioned in earlier posts i have no light in my dash and do not know which of the cut wires goes in its place., next I have on orange wire in the dash cut how can i tell if its the e-drive wire, because it disappears into the wiring harness.
79chiefs is offline   Reply With Quote Quick reply to this message
Unread 12-28-2012, 05:00 AM   #9
RockRollin
"Positive.....I think"
 
RockRollin's Avatar
1990 FSJ Wagoneer 
 
Join Date: Apr 2012
Location: Grand Haven Mi, USA
Posts: 1,095
Could use a vacuum pump, could compress and hold finger over hose nipple to see if it holds at release. I'm not real familiar with QT , but it will not go into low range if not locked into e-drive, from what I've read elsewhere.
RockRollin is offline   Reply With Quote Quick reply to this message
Unread 12-28-2012, 09:08 AM   #10
CSP
Registered User
 
Join Date: Aug 2002
Location: Colorado
Posts: 12,586
Quote:
Originally Posted by RockRollin View Post
but it will not go into low range if not locked into e-drive, from what I've read elsewhere.
That would be incorrect. There's nothing to prevent it going into low range that has anything to do with the e-drive.
CSP is offline   Reply With Quote Quick reply to this message
Unread 12-28-2012, 12:37 PM   #11
olliehopnoodle
Registered User
1982 FSJ Cherokee 
 
Join Date: Sep 2012
Location: mesa, az
Posts: 1,064
How big of a difference are the tires?

You don't want to just hook the t-case up to manifold vacuum. If you do it will jump in/out of e-drive basically everytime you put a load on the engine. To keep it in edrive you want to hook it up to the vacuum canister. The canister maintains a vacuum even when the engine is under load. You will want to test to make sure it is working.

Best bet is get some tires that match. It will be cheaper than buring out your T-case.
__________________
82 Cherokee WT - SOA/SF/agr box/Borgeson ujoint steering shaft/401/performer/holley TA/HEI/BeCool/727/np208/d44(aussie)/amc20(ARB)/BFG 35X12.5/Corbeau Moab Seats/RCI 6point Harness,Hella Aux lights/tuffy console/killer32 slider bars/custom bumpers and roll bar/Alpine head unit/amps/speakers 2002 Liberty Limited Early edition - Basically stock
olliehopnoodle is offline   Reply With Quote Quick reply to this message
Unread 12-28-2012, 12:53 PM   #12
79chiefs
Registered User
1988 XJ Cherokee 
 
Join Date: Dec 2012
Location: Lillington, NC
Posts: 984
They are 31's on front 32's on back, also how do i know when its in e-drive
79chiefs is offline   Reply With Quote Quick reply to this message
Unread 12-28-2012, 03:06 PM   #13
olliehopnoodle
Registered User
1982 FSJ Cherokee 
 
Join Date: Sep 2012
Location: mesa, az
Posts: 1,064
I am not sure how you would know for sure, especially if you bypass the system. I don't know that running it in E-drive is a good idea either. If my understanding is correct, E-Drive 'forces' the front/rear drive shafts to spin at the same speed. If the tires are different size it is going to bind/unbind over and over.

How much do you expect to drive it like this?
__________________
82 Cherokee WT - SOA/SF/agr box/Borgeson ujoint steering shaft/401/performer/holley TA/HEI/BeCool/727/np208/d44(aussie)/amc20(ARB)/BFG 35X12.5/Corbeau Moab Seats/RCI 6point Harness,Hella Aux lights/tuffy console/killer32 slider bars/custom bumpers and roll bar/Alpine head unit/amps/speakers 2002 Liberty Limited Early edition - Basically stock
olliehopnoodle is offline   Reply With Quote Quick reply to this message
Unread 12-28-2012, 05:29 PM   #14
RockRollin
"Positive.....I think"
 
RockRollin's Avatar
1990 FSJ Wagoneer 
 
Join Date: Apr 2012
Location: Grand Haven Mi, USA
Posts: 1,095
Quote:
Originally Posted by CSP View Post
That would be incorrect. There's nothing to prevent it going into low range that has anything to do with the e-drive.
Right, just reread. I'm off .I'll take the cotton outta my ears and stick em in my mouth and listen
RockRollin is offline   Reply With Quote Quick reply to this message
Unread 12-29-2012, 07:45 AM   #15
Dumpy
Registered User
1972 J-Series Truck 
 
Join Date: Feb 2009
Location: Franklin, NC
Posts: 164
Easiest solution is to replace all the vacuum lines, and find an EDrive glove box switch. Sign up at IFSJA and post on the wanted section. You CAN drive with EDrive engaged, without the front drive shaft. The Quadratrac is an excellent system as long as its been maintained. Make sure you put the correct fluid in. You can get it at BJ's off road. ATF will destroy it. Yu can also get a new glove box insert at BJ's. They Are cardboard from the factory. They offer cardboard and plastic. Don't hurry this and ruin it. Get the correct parts, make sure it works as it should, then drive it.

For IFSJA, make sure you read the READ FIRST section, and email Tad, one of the moderators, and he will let you on. He's the manual spambot filter.
__________________
'96 ZJ
'72 Jeep J2000 Pickup
Dumpy is offline   Reply With Quote Quick reply to this message
Reply

Tags
quadratrac , transfer case , transmission help

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

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






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.