What have I gotten myself into? - 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 > Jeep Wrangler Forums > YJ Wrangler Technical Forum > What have I gotten myself into?

FS: Jeep Fog Light LED Bulbs! Several Brightness Options! USA Standard Chromoly Front Axle Shaft Kits with Dana 30 4The Jeep Forum Discount is ON!

Reply
Unread 04-16-2014, 11:04 AM   #1
BHawkmeck
Registered User
1983 CJ7 
 
Join Date: Aug 2013
Location: Trivoli, Illinois
Posts: 220
What have I gotten myself into?

Hi everyone,
I'm usually creeping over on the CJ side. Here is my story and what I have gotten myself into. After numerous months of making fun of my the girlfriend's 2012 Compass with 2wd drive, she went out and found a really clean 87 YJ 4.2/ (BA5/10 with synco's going out) 4.88 on 31's. I have replaced the rotted out rear frame rails and replaced the body mounts. A good friend of mine's daughter rolled her 98 cherokee 3 times nose/tail. Shes fine but the Cherokee isnt. For free im getting the whole drive train. 4.0 AW4 NP who really cares. I plan on doing the 4.0 EFI OBDII Head conversion and AW4 swap. By trade i'm a 30 year helicopter mechanic for the Guard full time and a A&P. Been wrenching on cars since I was 10. Have done quiet a few LS conversions in older vehicles. I just wanted to give everyone some info so I dont sound like a complete NOOB. I hope if I cant find it on the search engine, maybe someone on here has run across the problems I know I will come across.

Thanks everyone and I will start posting pictures as I begin this little adventure.

BHawkmeck is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 11:17 AM   #2
Varnish
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2005
Location: Juneau, AK
Posts: 4,364
Why not just take the complete 4.0 as is from the XJ? The motor mounts will transfer. I've done a couple swaps, last year a '00 XJ drivetrain into a CJ. My method is take the complete engine wiring harness and drivetrain out of the XJ, strip out what I don't need from the XJ harness (AC/cruise/lighting) and make the necessary connections at the YJ bulkhead connector. Lotta pouring over wiring diagrams. For the CJ I had to run a few extras like the rear electric fuel pump but the YJ should already have that wiring from the bulkhead back to the tank as the '87 4banger was fuel injected. You can graft in an electric fuel pump into your existing YJ tank or use an external. Get a '91 YJ vehicle speed sensor which you can wire into the XJ PCM but has the passthrough for your cable-driven speedo. The aw4 transfer case will be slightly clocked down but I was able to fit one in my YJ over the stock crossmember with my 1" body lift, you can also redrill the tail housing to reclock it or get a clocking ring.
__________________
'98 TJ (see profile)
'88 YJ with 4.0/AW4 swap & CJ front end
'80s CJ Resto-mod ('80s CJ frame/front end, YJ tub, '00 XJ 4.0)
'99 XJ 4dr SE
Varnish is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 12:08 PM   #3
zeus87gn
Automotive Neurosurgeon
 
zeus87gn's Avatar
1987 YJ Wrangler 
 
Join Date: Sep 2006
Location: Hernando, Mississippi
Posts: 2,426
The 4.0l head conversion to the 4.2 is the way to go IMO....if the bottom end is up for it
Many of the original factory built 4.2s weren't built very well so keep it in mind before actually doing the complete comversion
You may want to give it a compression and bearing clearance check

I also have a feeling you're going to be geared too low by the time your done
Again, JMO
__________________
Handicapped license plates are not for mentally handicapped people -

"Man has not yet evolved an inch from the primordial slime that spawned him." Mark Blankfield, Jekyll & Hyde... Together again

Holley Carb thread
zeus87gn is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 12:09 PM   #4
BHawkmeck
Registered User
1983 CJ7 
 
Join Date: Aug 2013
Location: Trivoli, Illinois
Posts: 220
Varnish,
The 4.0 in the donor vehicle has over 200K, the 4.2 has 2k on a fresh rebuild that I have already nuttered. I plan on grafting in the electric fuel pump from the cherokee to the original YJ tank. As for wiring I have a few items left over from being in aviation for 30 years. I plan on making a full circuit breaker panel with resetable breakers like what you find in aircraft. A custom relay panel to control the fuel pump, headlights, cooling fans, winch and anything else that has a high current load. I have all the wire diagrams allready layed out with both types of vehicles. I had planed on just reclocking the TC.

The reason I want the fuel injection and automatic is that my soon to be wife cant drive a stick to save her life. We have tried and tried and both came to the conclusion that she just cant drive a stick. Dont get me wrong, she loves going on the trails with me in my CJ and really wants to get into it. There are some people that just cant seem to master driving a stick.
BHawkmeck is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 12:12 PM   #5
BHawkmeck
Registered User
1983 CJ7 
 
Join Date: Aug 2013
Location: Trivoli, Illinois
Posts: 220
Here is my CJ
28775_10200756636705280_1855540682_n.jpg

BHawkmeck is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 12:13 PM   #6
BHawkmeck
Registered User
1983 CJ7 
 
Join Date: Aug 2013
Location: Trivoli, Illinois
Posts: 220
The only pic of Laura's YJ I can find.
601782_10200706473411229_622334795_n.jpg  
BHawkmeck is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 12:18 PM   #7
BHawkmeck
Registered User
1983 CJ7 
 
Join Date: Aug 2013
Location: Trivoli, Illinois
Posts: 220
What I do for a living.
63124_3895414586578_711814131_n.jpg

BHawkmeck is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 12:45 PM   #8
Varnish
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2005
Location: Juneau, AK
Posts: 4,364
Sounds like a plan. The aw4 is a great tranny, I love it. Zeus may be on to something with the gear ratio, I know the cherokee aw4 guys typically suggest 4.56 with 33s so 4.88 and 31s may be a bit tall if the thing will see higher speeds.
__________________
'98 TJ (see profile)
'88 YJ with 4.0/AW4 swap & CJ front end
'80s CJ Resto-mod ('80s CJ frame/front end, YJ tub, '00 XJ 4.0)
'99 XJ 4dr SE
Varnish is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 01:22 PM   #9
YJ4LIFE
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2011
Location: , San Angeles
Posts: 787
search on that tranny and 4.2l if there's any internal/external balancing issues.
__________________
'89 YJ, 4.2L, ax-15, B&M shifter, 1" BL, TJ flares, '99 intake, '91 EFI, 5.0L explorer injectors, GenRight tank & stretch, 35" ProComp Xtreme muds, 52" chevy springs rear, 44044 Ranchos front.....
YJ4LIFE is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 01:55 PM   #10
BHawkmeck
Registered User
1983 CJ7 
 
Join Date: Aug 2013
Location: Trivoli, Illinois
Posts: 220
YJ4LIFE,
Good question. I did some looking just now and the I6 are all internally balance. Flex plates shouldnt be a issue. I hope LOL
BHawkmeck is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 02:00 PM   #11
The_Goob
Hell on Wheels
 
The_Goob's Avatar
1991 YJ Wrangler 
 
Join Date: Jun 2012
Location: Walcott, IA
Posts: 4,226
Interesting project, subbed to watch. Im about an hour and a half up the road from you.
__________________
The_Goob is offline   Reply With Quote Quick reply to this message
Unread 04-16-2014, 03:38 PM   #12
superj
Registered User
1987 YJ Wrangler 
 
Join Date: Mar 2008
Location: corpus christi, texas
Posts: 6,952
You guys come tdy to get depot level training on those where I work.
__________________
I don't feel like working on anything, at this time.
superj is offline   Reply With Quote Quick reply to this message
Unread 05-19-2015, 09:41 AM   #13
BHawkmeck
Registered User
1983 CJ7 
 
Join Date: Aug 2013
Location: Trivoli, Illinois
Posts: 220
Hi everyone,
Been awhile since I posted last. Life got in the way for a bit. Started on the body work. 7-10 layers of paint on this rig. Decieded to go down to metal. Finding some issues but nothing horrible.
wp_20150516_001.jpg   wp_20150516_002.jpg   wp_20150516_003.jpg  
BHawkmeck is offline   Reply With Quote Quick reply to this message
Unread 05-19-2015, 09:56 AM   #14
LVJeepster
Registered User
1993 YJ Wrangler 
 
Join Date: Apr 2015
Location: Henderson, Nevada
Posts: 42
Pretty sure anyone who has worked on a jeep has asked themselves the same questions. The pics of the pieces your posted look pretty clean... yeah for small things.
LVJeepster is offline   Reply With Quote Quick reply to this message
Unread 05-26-2015, 08:20 AM   #15
BHawkmeck
Registered User
1983 CJ7 
 
Join Date: Aug 2013
Location: Trivoli, Illinois
Posts: 220
The donor Jeep for the FI and the drivetrain. It actually started and drove up on the trailer. Lower end of the engine has a pretty good knock so it will be a head/FI swap.
wp_20150524_001.jpg  
BHawkmeck is offline   Reply With Quote Quick reply to this message
Reply

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.