All TJs, except Rubis, use a NV231 transfer case, see below. Check around local salvage yards, classifieds, etc, and find one out of another TJ. You can also check with, daveysjeeps.com, look under parts specials and/or call them

But first, what's wrong with the one you have?

Transfer Case info from stock specs.

NV231 Command-Trac - 1997-2006
* Used on all TJs except Rubicon models
* 2.72:1 Low range
* Slip yoke
* Gear driven speedometer signal

NV241 Rock-Trac - 2003-2006
* Standard transfer case used on all Rubicon model TJs.
* 4:1 Low range
* Fixed yoke
* Electronic speedometer signal

 

Thanks for the info 2jhanna. Well, the transfer case gears inside are all shredded and the case itself broke. If you try to drive the vehicle there is a lot of grinding from the transfer case. I was driving on the highway and there was a lot of vibration and then a big bang. Now there is a hole in the transfer case from the gears inside exploding or something and it is trashed. An auto repair shop looked at it and quoted me a new transfer case saying this one is toast. I have not removed it yet and that is the next step that I need help with. Trying to understand what I need before I dig into it.

Thanks for the help! :2thumbsup:

 

I didn't see anyone mentioned it here, but if you don't know why the case broke exactly, was your front driveshaft making any noise? Not saying that's the reason, but if you put in a new tc you could end up exploding the new one too

 

BTW - When I search on-line there are NV231 and NP231 transfer cases... are these the same?

NV stands for New Venture and NP stand for New process from what I am reading... Can I use either one?

I am going to take a few pictures of the damage on the transfer case that is on the Jeep still to show later today...

 

They are the same thing. New Process was Chrysler's gear division. New Venture was a Chrysler/GM joint venture.

One thing that wasn't mentioned is that the input shaft can vary in length and spline count. IIRC Novak has a good table in their tech section showing which input shaft mates with which transmission. You'll either need to find a replacement case that is the same as yours or transfer over the input shaft.

As to removal, its pretty easy. Disconnect driveshafts. Disconnect shift linkage. Disconnect breather and sensor wire. Unbolt from the transmission.

 

It's an easy process to swap them out. The snap rings are by far the biggest PITA in the whole process. Look on Craigslist or a salvage yard. I think I picked up one for around $400.

 

If just swapping one case for another what snap rings are involved?

 

Does it matter if my 2006 Jeep is the Wrangler Unlimited (LJ) model versus the (TJ) model?

 

No

 

If just swapping one case for another what snap rings are involved?

You're right, I had to swap my SYE over and had to deal with them.