Any one got instructions or pictures on changing VC in NP249 transfer case? Also anyone changed for NP 242 and how does it work off road and in snow?

There are a few messages here about the procedure. I'm waiting for mine to arrive later this week, and I'll likely take some photos of the procedure.


See this thread http://www.automotiveforums.com/vbulletin/showthread.php?t=417286 where dksob81 offers to send pics. Thery're great and really help show how it's done.

Apparently it's possible to do it without dropping the TC, but it looks like quite a trick. Mine has a leak now as well, so I'll be dropping mine to do the job.

As for the 242, it's been discussed as well, a search should turn up some info for you.

Thanks - did see some general stuff and EMailed dksob81 to see if I could get pictures but no answer as yet. Did not see in depth about 242, just wondered how good the full time selection is on that transfer case, if it is a differential it is no use to me as has same problem as axle open differential, ie slips when you don't want it to.

Thanks - did see some general stuff and EMailed dksob81 to see if I could get pictures but no answer as yet. Did not see in depth about 242, just wondered how good the full time selection is on that transfer case, if it is a differential it is no use to me as has same problem as axle open differential, ie slips when you don't want it to.

Chris, I got your emails, I have recieved 6 emails from the postmaster at hotmail saying the delivery of my emails (VC Replacement procedure) to you were delayed, i just recieved 3 more about 3 minutes ago (it is 11:47 PM right now).. Do u have another email address I could send them to, I will try again.

Chris,

I just resent those instructions/pics... Let me knwo if you go them.

Chris , I got the same respsonse from the postmaster saying it was delayed.

Thanks for trying don'y know why there is a problem you could try my work email cewers@hipotronics.com, also just in case my email address is wrong ewersy@earthlink.net. Thanks a lot for your perseverence. I am still 50/50 about new VC or 242 swap, I like 249 case it got me out of scrapes so will probably stick with it. Pity the VC doesn't last longer. saw advert for gear replacement somewhere?

ok, Chris I sent you the VC replacement instruction pics, to your work email cewers@hipotronics.com.

humm, I wonder if there is away I can post them on the forum for eveyone who needs them to see.

It would be good, they are brilliant thanks. Got them via work EMail.

thanks for the comment.

Job done all working now thanks

load them into a webpage, or load them into this forum, in "your" pictures.

I would like to see them also...

Job done all working now thanks


Since I was a loser, and didn't take photos like I promised, I'll volunteer to host dksob81s pictures, let me know if that's ok.

OK, how to I go about posting them in my profile?
Meanwhile, if anyone wants the pics email me

Joe dksob81@hotmail.com

The_Penguin, if you want to host them thats fine, just email me and I will send them.

Ok, here's a link to Joe's helpful photos
I just slapped some bad html around 'em and dropped 'em on my server,
all credit goes to dksob :)

http://www.masoncomputing.com/np249/

Thanks Steve.
This will make it alot easier for people who are needing these instruction, now I won't have to send out 3 emails to hold all the photos.

Just joined. First post. How do you know when it is time to replace the viscous coupling? I have a 94 JGC and I'm having an issue that feels like driving over a bunch of cattle gaurds that have been spaced out on the highway (rough then smooth then rough then smooth, etc,.). Feels likes something is pulling on the Jeep during rough part. Can't really tell if vibration is from the front or back. It only happens after driving 60 MPH or higher for an hour or more. Letting off the gas makes it worse and constant. Problem still exists when putting Jeep into neutral and coasting. Once the problem starts, it continues even at slower speeds. Pulling over and letting it cool for 15 to 45 minutes allows you to drive another 30 to 60 minutes. History: Transfer case had been rebuilt in 2001 (120K miles on Jeep). CV half shafts and drivers side hub bearings replaced in spring of 2003 (140K miles on Jeep). First noticed problem starting in Fall of 2003. Most of the time didn't have to drive far, so didn't do any work on it. In summer of 2004, problem continuing, changed fluid in transfer case. Changed fluid and filter in transmission. Didn't see any metal shavings. Levels were fine in differentials, but I don't remember if I changed the fluids out. Several months later (Thanksgiving 2004), with 167K on Jeep now, was on a 4 hr trip. Had to pull over after an hour, but after letting it cool on a cold night, for an hour, had same problem after only 5-10 minutes of driving. Problem then rapidly got worse. Pulled over, smelled burnt oil, had smoke coming off of rear differential. Replaced entire rear end (differential, axles, hubs) with a used one that had 68K miles. Problem remained, but was a lot better. However, it is becoming just as bad again after only putting on 500 - 800 miles after replacing the rear end. Replaced fluids in rear and front differentials with synthetic, adding the additive to the rear for the TracLok. No help. Was going to check to make sure the coolent lines to the transmission weren't blocked next. Then was thinking about the front bearings or front differential. Any ideas?

Wow, odd problem. Doesn't sound like the VC. That problem is primarily evident only on tight turns.

I'll go ahead and start a new thread for this issue then.