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help with sye

M

mitsumotors

NAXJA Forum User
Location
Winnipeg
i want to do a sye on my 91 xj with a 242. i bought some parts used but i'm not sure if i have everything i need to use a front driveshaft off another xj in the rear. the guy sent me the yoke to go on the output of the t-case and an adapter for the yoke so a stock front driveshaft will bolt up. do i need to cut the output shaft and get a new shorter tailcone? what all do i need to do here?
 
Great Thread on doing a J Yard SYE and Front Driveshaft:

http://www.naxja.org/forum/showthread.php?t=959008&highlight=SYE+yoke

This is Dave41079's Setup.

SYE021.jpg



Iron Rock 4x4's SYE and Front Driveshaft can be found here:
http://www.ironrockoffroad.com/Merc...en=PROD&Store_Code=IROR&Product_Code=IR-X_HNT

Here is their PDF on doing a SYE and a Front Driveshaft.

http://www.ironrockoffroad.com/Merchant2/hack and Tap Install.pdf


hnt1.jpg


Hope this helps.
 
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23 Spline Input NP231 vs 21 Spline Input NP231 maybe?

NP231/21 Spline Short Input
AW4 (through 1990)
AX4
AX5
Peugeot BA 10/5 (earlier)

NP231/23 Spline Medium Input
46RE Jeep ZJ's '93 to '95 only
AW4 (post-'90)
 
Last edited:
actually, the one that i got is different than the rubicon express one.
here it is....
IMG_1876.jpg

IMG_1877.jpg

IMG_1878.jpg

IMG_1879.jpg

has anyone seen one like this before or know how it works on a 242?
thanks
 
cher96 said:
23 Spline Input NP231 vs 21 Spline Input NP231 maybe?

NP231/21 Spline Short Input
AW4 (through 1990)
AX4
AX5
Peugeot BA 10/5 (earlier)

NP231/23 Spline Medium Input
46RE Jeep ZJ's '93 to '95 only
AW4 (post-'90)
Click to expand...
Input shaft has absolutely nothing to do with it!
 
You still have to have the 3 bolt adapter flange/seal.
 
mitsumotors said:
do you mean the purple thing in this link http://www.rubiconexpress.com/JeepParts/Product.aspx?part=RE1801
i don't really see how that will allow the yoke to seal in the transfer case?
Click to expand...

That is a new flange/seal as RCP said, that seals to the output shaft, not the yoke.

Right now, if you pull your rear driveshaft, the yoke will come out of the t-case, and since the tailcone seals on the yoke, it will leak out all the fluid. That purple thing is so it will seal to the output shaft, as the new yoke (now that silver flange in your picture) will no longer extended into the transfercase, which would mean your t-case wouldn't be sealed.
 
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RCP Phx said:
Input shaft has absolutely nothing to do with it!
Click to expand...

Thanks. I do know that Input Shafts and Output Shafts are not the same thing. I was only Posting that if the NP231J has 2 different Input Shaft Sizes it may be Logical to think NP231s "maybe" have 2 different Output Shaft Sizes. I do not know if the Input Shafts corresponding Output Shaft would have been 27 Spline or not. There are three Variations of the NP 231J and two different Output Shaft Seals for '88 to '06 and I personally have no idea what would a Pre '88 Transfer Case might have.

All I know is the Jeeps NP231 (NP231J, J is for Jeep) has 2 Different Output Shaft Seals; One for 1988-95 and one Output Shaft Seal for 1994-06.

That is why I used the word "maybe" in my previous Post.

Sorry for my Presumption of People being able to read my Mind. Hope that explains why I posted that way.

cher96 Vicki
 
The flange you have is for the newer style transfer case. You need the older style flange (the silver part in your previous post). From what I see in the ad site you posted you will need the flange & seal kit for the older style case, as there is no way to seal the case with that flange.I believe the seal kit for the older case comes with a replacement tail housing & seal & you will need the longer flange spline to seal to. Read a little further down on the ad you posted & I think it will be self explanitory.
 
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