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View Full Version : ZJ 249 to 247 swap?



ptownTSI
07-03-2004, 06:09 AM
What are the benefits of the 247 t-case besides the gerotor instead of a VC? Is it stronger? I know it feels smoother (03 overland is what i drove) ESPECIALLY compared to my 249. I was talking with JayDee (dont know if hes registered here) and it said you can rally with the 247, which sounds pretty tight.

thanks,

Justin

Alaska ZJ
07-03-2004, 09:09 AM
Post up some specs for the 247 (chain drive, viscous coupler, electronic Shift). That information should be easy to find.

If not this thread is going by by.

BigDaveZJ
07-03-2004, 10:07 AM
I trust you'll handle this one Brentt. :D

OverkillZJ
07-03-2004, 01:49 PM
I trust you'll handle this one Brentt.


:twisted:

Alaska ZJ
07-03-2004, 03:47 PM
ptown- I am going out of the house for a few hours. maybe until tomarrow morning. If there is no technical data within this thread for us to mull over and talk about then I am tossing it in the garbage.

I want the search engine to pull up good threads not empty ones like this one is so far.

BigDaveZJ
07-03-2004, 03:57 PM
ptown- I am going out of the house for a few hours. maybe until tomarrow morning. If there is no technical data within this thread for us to mull over and talk about then I am tossing it in the garbage.

I want the search engine to pull up good threads not empty ones like this one is so far.

Ladies and gentleman, this is why Alaska ZJ is a mod for the tech forums!!

BMRisko
07-03-2004, 06:50 PM
ptown- I am going out of the house for a few hours. maybe until tomarrow morning. If there is no technical data within this thread for us to mull over and talk about then I am tossing it in the garbage.

I want the search engine to pull up good threads not empty ones like this one is so far.

Ladies and gentleman, this is why Alaska ZJ is a mod for the tech forums!!

DUde, I was looking for my ban and delete button 2 minutes after this was posted, but unfortunately I don't have those powers in this section of the forum. :twisted:

ptownTSI
07-03-2004, 06:53 PM
http://www.jeepin.com/campjeep1998/nv247.jpg

8)

gearhead313
07-03-2004, 09:08 PM
The gears and chain are supposed to be very similar. One would probably not be considered stronger, but more correctly "as strong".

The 247 is different in that power is at the rear and added to the front instead of visa-versa like the 249. In the 247, the main shaft is straight through, which drives the gerotor pump inside of the outer hub that drives the front end. The difference in rotating speeds (ex: loss of traction to the front axle) will drive the pump, forcing the clutch packs together helping the axle with traction to spin.

more info about the systems:

http://www.czi3d.com/quicktimevr.html
http://www.findarticles.com/p/articles/mi_m3012/is_n6_v178/ai_20846028


. . .at least it locks in 4Lo unlike the 93-95 249's

nathaniel
07-03-2004, 09:39 PM
The answer is it doesn't have a speedo spot so there is little chance of you using it unless you are a buggy. garbage if you want a street case get an older 249.

gearhead313
07-03-2004, 09:42 PM
The answer is it doesn't have a speedo spot so there is little chance of you using it unless you are a buggy. garbage if you want a street case get an older 249.

looks like a spot for a speedo in the pic above... :dunno:

ptownTSI
07-04-2004, 12:18 AM
i bet i could cut the axle tubes off of a WJ front axle with the gerotor and weld the casing to the ZJ axle tubes, then swap to the WJ knuckles to be able to run a large 13" or so Cobra front brakes.

voila! i can keep my rims, and stillen brakes until i can afford the cobra's.

in case you havent noticed i'm not tryin to build a hardcore off-roader. I just want something that is as smooth and sufficient as a WJ for snow, without the 249 and without needing to swap in an auburn in the 30.

ptownTSI
07-04-2004, 12:32 AM
what is the hp/tq rating on the 247 compared to a 249? will it be suitable for over 400hp?

think blown 5.9. :shock:

Raacerx
07-04-2004, 02:54 AM
i bet i could cut the axle tubes off of a WJ front axle with the gerotor and weld the casing to the ZJ axle tubes, then swap to the WJ knuckles to be able to run a large 13" or so Cobra front brakes.

voila! i can keep my rims, and stillen brakes until i can afford the cobra's.

in case you havent noticed i'm not tryin to build a hardcore off-roader. I just want something that is as smooth and sufficient as a WJ for snow, without the 249 and without needing to swap in an auburn in the 30.

Cut the axle tubes off a WJ? Swap the WJ knuckles? 247? Am I the only one confused?

BigDaveZJ
07-04-2004, 04:16 AM
Well, there's kinda tech in here. It's kind of strange, overkill, and pointless tech, but it's here, even though some of it is borderline incorrect. I'll leave this one up to you Brentt.

Alaska ZJ
07-04-2004, 10:11 AM
Allright you tried to provide tech or atleast good information for us to talk about, but you failed terribly. Because the board is new and we are just now setting the groundwork and presedence for what level of talk we want on this board I am going to show you what I was looking for.

NV 247- This is a Proggressive On Demand transfercase. It's maximum rated Torque is 1800 ft. lbs. It weighs in Dry at 83 pounds. Uses 2.5 pints of ATF and is rated for use in a vehicle with a GVW of 6k.

Progressive On-Demand 4WD Operation: The vehicle operated in 2WD. When traction is lost by one of the driving wheels, power is automatically transferred to the other axle. Torque transfer is transparent to the driver.

NV 249- Is a Full Time case that has a maximum TQ rating of 1800 lbs, weighs in at 98 pounds, uses 2.5 pints of fluid and is rated for a 6k GVW.

Full-time 4WD Operation- Power is distributed to front and rear axles during normal vehicle operation

New Venture Gear (http://www.newventuregear.com/tcases.html)

Here is an exploded view of the NV 249
http://www.drivetrain.com/249_p1.jpg
http://www.drivetrain.com/249_p2.jpg

Here is a link for the 247 247 Link (http://www.wjjeeps.com/tcases.htm#QUADRA)

And a big picture of the 247. I can't seem to find an online exploded view

http://www.wjjeeps.com/quadra2.jpg

Sorry if you can't speak Russian but I think that there is English Tanslator Software on the site already.

247 Information and Pictures (http://www.jeep.auto.ru/lockers/Dana/gerodisk.htm)

Any and all of that should have been incorperated in your post's.

gearhead313
07-04-2004, 10:37 AM
8)

nathaniel
07-04-2004, 11:33 AM
Ptown the case you want is the early 249. Strong and a way better bias of power than the late 249 48f-52r vs 20f-80r.

Just expensive VC's

For your front axle just swap in the gerorotor http://www.randysringandpinion.com/img/prodcases.jpg

Kolak just swapped the tc into his 5.9 out of Kevins jeep ~6 months ago.

Getting the geroroter case will be cheap as well as the TC because evryone wants to get rid of them and then you would have a street jeep with real AWD would fly through the snow and rain.

Alaska ZJ
07-04-2004, 01:55 PM
Um...why would you swap any of this shit, just to put in more shit? I mean look at the stats. You are not gaining a damn thing.

Get a 231 or a D300 get off your lazy ass and pull the lever into 4wd when it is snowy and icy. Before you give me any shit about the snow and ice thing and how the auto cases are a benefit....look real close at my screen name. If there is one thing that I know it is that I probably have more days driving on roads that would shut most lower 48 cities down than any 10 people on this board combined. Shitty conditions = shift into 4wd and slow the hell down.

There are no benefits to swapping these two options in my opinion. PLEASE enlighten us to why you think that there is a valid reason? I mean I am always up for a education.

All that research I did and apparently you didn't read any of it or if you did you came to a different conclusion. Please explain.

ptownTSI
07-04-2004, 04:27 PM
alaska, this is what I like to do.

http://www.krcperformance.com/images/TimEaton1.wmv

as well as this

LINK DELETED

explain how I can do both with a 231? The way I see it gerotor front axle would be perfect for what i'm looking for. Another option for the t-case is a custom built level10 249, i think it still retails locking 4 lo, but makes the output 50/50 like a 93-95 249. This takes some pressure off of the VC (according to Chuck B who's jeep ran a low 12 sec 1/4 mile) and runs New York Speed and Machine.

ptownTSI
07-04-2004, 04:30 PM
Ptown the case you want is the early 249. Strong and a way better bias of power than the late 249 48f-52r vs 20f-80r.

Just expensive VC's

For your front axle just swap in the gerorotor http://www.randysringandpinion.com/img/prodcases.jpg

Kolak just swapped the tc into his 5.9 out of Kevins jeep ~6 months ago.

Getting the geroroter case will be cheap as well as the TC because evryone wants to get rid of them and then you would have a street jeep with real AWD would fly through the snow and rain.

so the dubya jay guys dont like gerorotors? Are they selling for a geared limited slip or a locker or what?

BigDaveZJ
07-04-2004, 04:47 PM
I deleted the 2nd link in your post because it showed irresponsible driving I guess you could call it. Posting videos of people blatanly traveling off a trail, or through a park as it appeared in that vid is NOT cool on here. Yeah, there was a foot of snow over everything, but I doubt you'd like it if I drove through your front yard when there was a foot of snow there.


I'm still clueless as to what this has to do with anything 4-wheeling related except a little bit of tech info.

jwbronco
07-04-2004, 04:59 PM
When I get my transfercase swapped out I'll make you a hell of a deal on a 247. I wish they only came with 231's or 242's.

Alaska ZJ
07-04-2004, 05:57 PM
If I hadn't spent all that time looking up all those tech links I would delete this thread.

Drag racing in a Jeep is dumb. Specially when my 7000 pound Duramax would probalby kick your ass.

This thread is offically locked to keep the bullshit from getting any deeper in here.

If your gonna post "racing" stuff at least make sure there is some tech involved.....