WHAT IS THE DIFFERANCE BETWEEN A NV233 AND NV244? DO THEY BOLT ON THE SAME ON YOURTRUCK? CAN YOU USE A NV233 IF YOU HAD A NV244 ON YOUR TRUCK? WHAT IF I HAD A NV244 CAN I SWAP THE HOUSING FROM A NV233 AND MAKE IT A NV244?

 

Nick

Externally, both cases are the same.I cansay for a fact that either one is a bolt in swap.

The NV233 is a two speed part time 4x4 case that cannot be used on hard surfaces. The NV244 has a mini differential inside that allows full time 4x4/AWD operation on hard surfaces as well as a 4Hi and 4Lo setting.

I made the swap from part time to full time back in Feb. of 2007, and have had no issues.

The AWD is great because you don't slip and slide when its wet out, and the fuel penalty runs anywhere from none to 2mpg depding on your driving style.

Don

 

thanks buddy for the information my n244 case is crack so i will need to use the 233 case for some where if i can't find a 244 case.

 

It's a coupler not a mini differential but you nailed it!

 

Hydra:

Not saying I can't be wrong, but my understanding of the newer T cases is that the 244 had a diff, whereas the older 242 series cases have the viscious coupling which is much more sensitive to mismatched tires, etc.

As I understand it, the VC generates quite bit of heat due to its design when it is allowing slippage.

A differential OTOH as in the 244and likeour front and rear axle does its job without near as much heat being generated.

A friend of mind who had a mid 90's Jeep Grand Cherokee with the full time case suffered two separate incidents of vehicle fires when Wal-Mart installed two tires that were not the exact same size and brand as the ones already there.He told me that his case was the impetus for the memo in their service bays which states they will not install/sell tires for an AWD vehicle unless you purchase 4 at a time in the same brand/size.

Don

 

SO I HAVE CALLED THE DEALER AND CHECK THE PART NUMBERS FOR MYSELF TO SEE,IF A233 AND 244 WAS THE SAME SIZE,EXTERNALLY AND THEY ARE NOT. THEY HAVE DIFFERENT PART NUMBERS.SO NOW I WONDERING CAN IDOWN SIZE FOR A WHILE TO A 233?

 

Nick:

Maybe I misunderstood you. Were you asking if you could put the case of a 233 onto the guts of your 244?? To that, I would say the answer is no.

As far as swapping from a 233 to a 244, or the reverse, it will work 100% with out any drama.

If you look around, the 233 cases are much easier to fine second hand since the AWD case was only standard on the R/T, and not many folks selected the AWD option when they ordered their D brand new.

Don

 

I still believe it is a Viscous Coupler just a different design. It incorporates the same idea but is lubricated by trany fluid. It also incorporates Anti Slip within.

The NV 242 HD T-case is completely different as it is the only true PT case. The same rules that apply with the 4 Hi Lock position but does a better job just as you talked about with slipage and heat but still transfers power, but not the same way.

I thought it incoporated the ABS as part of the AWD????

 

Hydra:

My D has the mostly useless RWD ABS, and when I swapped cases there was no indication of anything tying into the ABS system.

The Gen 2 D's that have stability/traction control no doubt use signals from the ABS system to read/compare wheel speeds.

To Nick:

Not sure what you are trying to accomplish at this point. Since the T case is cracked, you either have to replace it or rebuild it.

If cost is a concern, buying a known second hand unit is the way to go. Removal/install labor will be the same, but you won't have to spend tie money fixing it, just swapping it out.

At the same time, if the AWD does not suit you, go with the 233 and be done with it.

Don

 

I stubbed my toe on this thread, got out the shovel and am digging it up. So if the 231, 242 and 233 are basically the same as the 244 then how is it that the 244 does not have the 2WD option? I'm curious now if there is some electrical signal I can send to my 244 and have it shift into 2WD.

It just dawned on me, maybe it is the coupler itself that forces the design to be AWD?

Reason I ask is because I'm comparing my 05 Durango to Grand Cherokee (because I thought for a while my D was not as good of a 4x4 as a Grand Cherokee). I'm finding though that the GC (some years) came with the 5.7 Hemi mated to the 4-54RFE but have a NV245 or NV247 transfer case. In other words, except for the transfer case the GC is the same as the D. Not sure on the axles and I suspect swapping in a NV245 or NV247 might not work (or be worth it) considering the LSD or ELSD in the axles (with regard to the electronics and how the GC transfer cases operate).

Anyway....blah blah blah

I still want to know if there is some electrical signal I can send to my 244 and have it shift into 2WD. Or...another thought....maybe I can just put a manual shifter on the NV244 out of an older 00-03 D and get the 2WD? Whatever.