Looking to buy an XJ: 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 > Jeep Cherokee & Comanche Forums > XJ/MJ Cherokee Non-Technical Forum > Looking to buy an XJ: Help!

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineYear End Clearance Sale! Save 20%Warn, Smitybilt, Engo, Rugged Ridge Winches at CCOR

Reply
Unread 06-08-2013, 03:38 PM   #1
krawler510
Registered User
1999 XJ Cherokee 
 
Join Date: Dec 2007
Location: MD
Posts: 1,825
I've had a yj, lifted a tj, and now have a lifted JKUR. It's a beast of a jeep but it's time to move on.

What should I look for as common problem areas with XJs? I'm probably going to buy one that's lifted already to save money. I'm familiar with the 4.0L but neither of the XJ transmissions or axles or body.

Thanks guys!

__________________
'The early bird may get the worm, but the second mouse gets the cheese.'
krawler510 is offline   Reply With Quote Quick reply to this message
Unread 06-08-2013, 04:16 PM   #2
dmill89
Registered User
1995 XJ Cherokee 
 
Join Date: Sep 2012
Location: Harrisburg, PA
Posts: 781
The XJ transmissions used with the 4.0L are either the Aisin-Warner AW4 automatic (similar to the Aisin A340E used in 90s 4-Runners, Tacomas, and T100s), the AX15 manual (same as the YJ / early TJs, late-89-99), or the NV3550 manual (same as later TJs, 00-01). For XJs manual or automatic comes down to personal preference as both are very reliable. The exception being 87-89s with a manual which have the inferior Pergot BA10.

Any 91-99 XJ is reasonably reliable. 97+s have the updated body and a nicer interior. 00-01s suffer from the 0331 head issue that affects all 00-01 4.0L I6s, pre-91s have the RENIX (Renault-Bendix) fuel-injection which is less reliable than the Chrysler OBDI/OBDII systems used in 91 and newer models.

The transfer-case is either a NP231 or NP242 (basically a 231 with a center differential allowing for full-time 4WD in addition to 2-hi, 4-hi, and 4-low).

All 99 and earlier XJs have a High-Pinion Dana 30 in the front, 00-01s have a Low-Pinion Dana 30.

The rear is either a Dana 35 (all years, base), a Dana 44 (87-90, usually with the towing package), or a Chrysler 8.25" (91+, much more common than the D44, part of many packages in addition to the towing package, similar to the D44 in strength).

For 91-99 XJs the biggest thing to look for is rust (especially underneath and in the floors), aside from that the normal used car stuff (check fluid level/condition, belts, hoses, suspension parts, any weird noises, leaks, etc.).
dmill89 is offline   Reply With Quote Quick reply to this message
Unread 06-08-2013, 06:47 PM   #3
S8NNG8
Registered User
1995 XJ Cherokee 
 
Join Date: Feb 2012
Location: Helena, Montana
Posts: 4,534
If you're buying a lifted one, and the fenders have been trimmed, it's likely the fender liners have been removed, thus multiplying the rot/rust.
__________________
D3<!L!>3D
S8NNG8 is offline   Reply With Quote Quick reply to this message
Unread 06-08-2013, 06:53 PM   #4
skip11and1
Registered User
2013 MK Patriot 
 
Join Date: Feb 2008
Location: syracuse
Posts: 616
Quote:
Originally Posted by dmill89 View Post
The XJ transmissions used with the 4.0L are either the Aisin-Warner AW4 automatic (similar to the Aisin A340E used in 90s 4-Runners, Tacomas, and T100s), the AX15 manual (same as the YJ / early TJs, late-89-99), or the NV3550 manual (same as later TJs, 00-01). For XJs manual or automatic comes down to personal preference as both are very reliable. The exception being 87-89s with a manual which have the inferior Pergot BA10.

Any 91-99 XJ is reasonably reliable. 97+s have the updated body and a nicer interior. 00-01s suffer from the 0331 head issue that affects all 00-01 4.0L I6s, pre-91s have the RENIX (Renault-Bendix) fuel-injection which is less reliable than the Chrysler OBDI/OBDII systems used in 91 and newer models.

The transfer-case is either a NP231 or NP242 (basically a 231 with a center differential allowing for full-time 4WD in addition to 2-hi, 4-hi, and 4-low).

All 99 and earlier XJs have a High-Pinion Dana 30 in the front, 00-01s have a Low-Pinion Dana 30.

The rear is either a Dana 35 (all years, base), a Dana 44 (87-90, usually with the towing package), or a Chrysler 8.25" (91+, much more common than the D44, part of many packages in addition to the towing package, similar to the D44 in strength).

For 91-99 XJs the biggest thing to look for is rust (especially underneath and in the floors), aside from that the normal used car stuff (check fluid level/condition, belts, hoses, suspension parts, any weird noises, leaks, etc.).
nice sum up, pretty much contains everything you really need to know in buying an XJ
__________________
2013 Jeep Patriot 4x4 FD1 5spd
2004 R6 lowered, stretched, full exhaust, HIDs etc
2004 TJ Columbia package long armed w/ 33's (Sold)
2005 WK, v6 QT1 (girlfriends)
skip11and1 is offline   Reply With Quote Quick reply to this message
Unread 06-09-2013, 02:34 PM   #5
krawler510
Registered User
1999 XJ Cherokee 
 
Join Date: Dec 2007
Location: MD
Posts: 1,825
Awesome responses, thanks guys. When I test drive a few I might come back with pics and questions.

Sent from my iPhone using JeepForum
__________________
'The early bird may get the worm, but the second mouse gets the cheese.'
krawler510 is offline   Reply With Quote Quick reply to this message
Unread 06-09-2013, 02:47 PM   #6
Motorcharge
I know more than you.
 
Motorcharge's Avatar
1991 MJ Comanche 
 
Join Date: Oct 2008
Location: Richmond, Virginia
Posts: 12,121
Cracked heads on 00-01, rust at the rockers/floor pans/and cargo area are the biggest things to look out for.
If you had a YJ you know what to look for, pretty much the same issues.

And don't listen to people who tell you not to buy already lifted if you can get a good deal. Plenty of people abuse stock vehicles and stock parts can be replaced and aftermarket inspected the same as you would looking at a stock XJ. If you know what you're looking for for issues then it shouldn't matter if it's stock or not.
__________________

Quote:
Originally Posted by Ron Swanson
There is no such thing as bad weather. Only inadequate clothing and transportation.
Motorcharge is offline   Reply With Quote Quick reply to this message
Unread 06-10-2013, 06:48 PM   #7
krawler510
Registered User
1999 XJ Cherokee 
 
Join Date: Dec 2007
Location: MD
Posts: 1,825
Is the cracked head issue that big? How can I tell?

Sent from my iPhone using JeepForum
__________________
'The early bird may get the worm, but the second mouse gets the cheese.'
krawler510 is offline   Reply With Quote Quick reply to this message
Unread 06-10-2013, 08:30 PM   #8
dmill89
Registered User
1995 XJ Cherokee 
 
Join Date: Sep 2012
Location: Harrisburg, PA
Posts: 781
Quote:
Originally Posted by krawler510 View Post
Is the cracked head issue that big? How can I tell?

Sent from my iPhone using JeepForum
The crack mainly occurs if it was overheated, of course you never know if a used vehicle has been overheated in the past. The best way to check is to pull the valve cover and look for a crack between the #3 and #4 cylinders though few sellers will likely let you pull the valve cover. Otherwise look for milky oil either on the dipstick or under the oil cap. Of course an unscrupulous seller may do an oil change and/or dump in a ton of stop-leak in the coolant to try and hide the issues.
dmill89 is offline   Reply With Quote Quick reply to this message
Unread 06-10-2013, 08:36 PM   #9
Motorcharge
I know more than you.
 
Motorcharge's Avatar
1991 MJ Comanche 
 
Join Date: Oct 2008
Location: Richmond, Virginia
Posts: 12,121
It sound worse than it is. The head is extremely easy to replace if you can turn a wrench.

I had to replace mine (unrelated to the 0331 defect). Having never done it took about 7 hours, but it was extremely straight forward and the only thing I had to really look up was the torque specs for the bolts. Cost me ~$350 for the head and gasket set. Plus it can be pulled with the manifolds still attached.

It's kind of a blessing in disguise. You can find 00-01 XJ in otherwise really great shape with cracked heads for really cheap because people think the motor is ruined. I see them frequently here for under $1000 where they'd otherwise get $3-4k around here if they didn't have a cracked head.
__________________

Quote:
Originally Posted by Ron Swanson
There is no such thing as bad weather. Only inadequate clothing and transportation.
Motorcharge is offline   Reply With Quote Quick reply to this message
Unread 06-11-2013, 11:42 AM   #10
krawler510
Registered User
1999 XJ Cherokee 
 
Join Date: Dec 2007
Location: MD
Posts: 1,825
Ok, I feel better now. I have an '00 with 186,000 miles and 33s I want to look at. Probably asking too much for me though($6000). But the pics look super clean, maybe too clean.

Sent from my iPhone using JeepForum
__________________
'The early bird may get the worm, but the second mouse gets the cheese.'
krawler510 is offline   Reply With Quote Quick reply to this message
Unread 06-11-2013, 11:56 AM   #11
DNFJ
Web Wheeler
 
DNFJ's Avatar
2000 TJ Wrangler 
 
Join Date: Dec 2011
Location: Pittsburgh, PA
Posts: 3,770
buy mine or give me a tj for it.
__________________
Just Another Yellow TJ
Built Not Bought #704

Previous:
'00 XJ 6.5 on 35" KM2s
'96 ZJ 2 on 31" Baja Claws
DNFJ is offline   Reply With Quote Quick reply to this message
Unread 06-11-2013, 12:32 PM   #12
Muddy97Cherokee
Senior Member
 
Muddy97Cherokee's Avatar
1997 XJ Cherokee 
 
Join Date: Aug 2011
Location: Mustang, Oklahoma
Posts: 647
What the hell is a JKUR?
__________________
1997 XJ Sport
6.5" with 31's
Built to CRAWL
BUILD THREAD

-ZACK
Muddy97Cherokee is offline   Reply With Quote Quick reply to this message
Unread 06-11-2013, 12:51 PM   #13
S8NNG8
Registered User
1995 XJ Cherokee 
 
Join Date: Feb 2012
Location: Helena, Montana
Posts: 4,534
Quote:
Originally Posted by Muddy97Cherokee View Post
What the hell is a JKUR?
JK unlimited Rubicon(4dr Wrangler)
__________________
D3<!L!>3D
S8NNG8 is offline   Reply With Quote Quick reply to this message
Unread 06-11-2013, 01:41 PM   #14
krawler510
Registered User
1999 XJ Cherokee 
 
Join Date: Dec 2007
Location: MD
Posts: 1,825
Sorry, I'm use to the jk crowd now.

Sent from my iPhone using JeepForum
__________________
'The early bird may get the worm, but the second mouse gets the cheese.'
krawler510 is offline   Reply With Quote Quick reply to this message
Unread 06-11-2013, 02:48 PM   #15
Muddy97Cherokee
Senior Member
 
Muddy97Cherokee's Avatar
1997 XJ Cherokee 
 
Join Date: Aug 2011
Location: Mustang, Oklahoma
Posts: 647
Quote:
Originally Posted by S8NNG8 View Post

JK unlimited Rubicon(4dr Wrangler)
Ah, that's what I thought. My own jeep group had this controversy over this titling a few days ago. Some of my buddies have come to the conclusion that our 4 door xj's shall be called XJU's even though there is no such thing as a 3 letter model designations since there is no JKU on the VIN.
__________________
1997 XJ Sport
6.5" with 31's
Built to CRAWL
BUILD THREAD

-ZACK
Muddy97Cherokee 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.