Front driveshaft disconnect - 249 - JeepForum.com
 
LinkBack Thread Tools
post #1 of 11 Old 04-30-2013, 04:16 PM Thread Starter
capcyclone
Member
 
capcyclone's Avatar
1998 ZJ 
 
Join Date: May 2011
Location: Phoenix
Posts: 239
Front driveshaft disconnect - 249

So, an interesting topic came up at my work today. A guy has a '97 zj with a 249 transfer case. His front driveshaft is disconnected - presumably because the VC was bad, but he doesn't really know why (it was that way when he bought it).

I'm thinking of buying it from him for my son, but would definitely want to either swap the TC or do the VC swap. If the driveshaft has been disconnected - is there anything I'd need to look at/do besides trying a VC swap, reconnecting and see where that leaves me?


"The Jeep is America's only real sports car" - Enzo Ferrari
capcyclone is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 04-30-2013, 05:44 PM
Snowfan2
Registered User
1998 ZJ 
 
Join Date: Jan 2012
Location: North of Amarillo
Posts: 667
The shaft may have been removed by someone seeking better mpg. Put the shaft back in and see how she rolls.

Be sure to run it up to highway speeds and check for noise and vibes in the front diff.

Maybe the VC is toast, maybe not. I have a good 249 for cheap if you need it.
Snowfan2 is offline  
post #3 of 11 Old 05-02-2013, 09:28 PM
WkndFun
Registered User
1998 ZJ 
 
Join Date: Nov 2012
Location: Fort Wayne
Posts: 60
I did the same to mine when my VC went bad.. Sounded like an extremely bad wheel bearing, and anything over 40mph was impossible. I just found a rebuilt 249 off a buddy and swapped that in for the time being. A VC repair kit are really only found on Ebay and are more than a new transfer case. The VC is actually a discontinued part. Even after I swapped the TC, I kept the front driveshaft out for awhile. Or even the 2 hour road trip to the offroad park. Believe it or not, I gain almost 2mpg with it out..
WkndFun is offline  
post #4 of 11 Old 05-02-2013, 09:33 PM
WhiteOut
Web Wheeler
 
WhiteOut's Avatar
1998 ZJ 
 
Join Date: Dec 2007
Posts: 8,205
Quote:
Originally Posted by WkndFun View Post
Or even the 2 hour road trip to the offroad park. Believe it or not, I gain almost 2mpg with it out..
No you dont. With the shaft in or out, everything still rotates. There may be small gains, but nowhere near enough to measure. If you have swapped in manual hubs, then its different, but you will never make up the cost in gas savings.
WhiteOut is offline  
post #5 of 11 Old 05-02-2013, 10:27 PM
jt_armstrong
Registered User
1994 ZJ 
 
Join Date: Jan 2011
Location: Lake Forest
Posts: 183
Wouldn't a new VC just sieze up if you ran it with one driveshaft disconnected?
jt_armstrong is offline  
post #6 of 11 Old 05-03-2013, 08:54 AM
PolkaPower
Registered User
1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss
Posts: 19,250
Quote:
Originally Posted by jt_armstrong View Post
Wouldn't a new VC just sieze up if you ran it with one driveshaft disconnected?
For you it would. 93-95 are designed different. 96+ it's ok to take the front shaft out.
PolkaPower is offline  
post #7 of 11 Old 05-03-2013, 01:52 PM Thread Starter
capcyclone
Member
 
capcyclone's Avatar
1998 ZJ 
 
Join Date: May 2011
Location: Phoenix
Posts: 239
Quote:
Originally Posted by jt_armstrong View Post
Wouldn't a new VC just sieze up if you ran it with one driveshaft disconnected?
In my case, I was suggesting that I'd put a new VC in and reconnect the front driveshaft. I'm one of the weird ones on this forum that likes the AWD 249.

"The Jeep is America's only real sports car" - Enzo Ferrari
capcyclone is offline  
post #8 of 11 Old 05-03-2013, 01:58 PM
kg6mov
Hears the voices
 
kg6mov's Avatar
1996 ZJ 
 
Join Date: Nov 2012
Location: Cupertino
Posts: 10,245
New vc and a new driveshaft, good to go. The 249 is a great case.

1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
1998 ZJ 5.9 - Junked
1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
kg6mov is offline  
post #9 of 11 Old 05-03-2013, 05:11 PM Thread Starter
capcyclone
Member
 
capcyclone's Avatar
1998 ZJ 
 
Join Date: May 2011
Location: Phoenix
Posts: 239
So we bought the '97 for my son. We reconnected a front drive shaft. All seems okay.

I've seen my next question asked more than a few times - but how can I determine whether the VC is bad or not? I've read about doing the figure 8s in a parking lot - and that if there is a lot of "binding" - that's a good indication of VC trouble. But can someone describe "binding" in this context? What occurs? The vehicle will have a lot of hesitation to do the turns? There will be excessive rubber marks on the ground? Both? A better description of what people mean when they say "binding" would be a big help to me here.

"The Jeep is America's only real sports car" - Enzo Ferrari
capcyclone is offline  
post #10 of 11 Old 05-03-2013, 05:14 PM
PolkaPower
Registered User
1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss
Posts: 19,250
Hopping, wobbling, hard to turn, lumpy feeling, and black tire marks are sure bets.
PolkaPower is offline  
post #11 of 11 Old 05-03-2013, 05:27 PM
kg6mov
Hears the voices
 
kg6mov's Avatar
1996 ZJ 
 
Join Date: Nov 2012
Location: Cupertino
Posts: 10,245
If it drives like it's in 4 part time then the vc is bad. When it dies it basically locks the shafts at the same speed and will act funny in turns.

Figure 8s are the best test. Take a drive around the neighborhood first to get things warm.

1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
1998 ZJ 5.9 - Junked
1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
kg6mov is offline  
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.



Email Address:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome