Transfer Case Swap Info NP249->NP231 & NP242 - Page 121 - JeepForum.com

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post #1801 of 3196 Old 10-28-2013, 06:13 PM
OverlandZJ
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Quote:
Originally Posted by smccloud View Post
My 249 is internal

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But you asked about a 242..

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post #1802 of 3196 Old 10-28-2013, 06:24 PM
smccloud
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Quote:
Originally Posted by OverlandZJ
But you asked about a 242..
True, I did. What are the odds I will have to shorten my driveshaft?

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post #1803 of 3196 Old 10-28-2013, 06:57 PM
Muzramp
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Quote:
Originally Posted by smccloud View Post
True, I did. What are the odds I will have to shorten my driveshaft?

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Higher than not needing too.
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post #1804 of 3196 Old 10-28-2013, 08:41 PM
Platinum5nine
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Only one way to find out. I have done 2 so far and neither had to be shortened.

Platinum 5.9 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts
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post #1805 of 3196 Old 11-01-2013, 12:06 PM
iann32
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Ok so I've been searching and trying to get as much info on the swap to the 242 that I could and I was wondering if anybody can help me out. First off I have a 95 zj limiyed with the v8 and 46rh tranny, the build date on my 249 tc is early 94 so it should have the early style gear cut. My question is would I have the 1.55 input shaft or is the .84? Also, whould I need the rear drive shaft fron the donor vehicle?

Thanks,
Ian
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post #1806 of 3196 Old 11-02-2013, 08:49 AM
zarnold
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Quote:
Originally Posted by iann32 View Post
Ok so I've been searching and trying to get as much info on the swap to the 242 that I could and I was wondering if anybody can help me out. First off I have a 95 zj limiyed with the v8 and 46rh tranny, the build date on my 249 tc is early 94 so it should have the early style gear cut. My question is would I have the 1.55 input shaft or is the .84? Also, whould I need the rear drive shaft fron the donor vehicle?

Thanks,
Ian
You will have the 1.55 input. The donor driveshaft will most probably be to short, while the one you have will be to long. This varies a little, and you may not have to shorten your drive shaft, but the odds are against you here. If you can get the donor driveshaft for a good deal you can use it to test the tc, but I would not use it for anything but that.
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post #1807 of 3196 Old 11-02-2013, 01:35 PM
iann32
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Quote:
Originally Posted by zarnold View Post
You will have the 1.55 input. The donor driveshaft will most probably be to short, while the one you have will be to long. This varies a little, and you may not have to shorten your drive shaft, but the odds are against you here. If you can get the donor driveshaft for a good deal you can use it to test the tc, but I would not use it for anything but that.
Ok thanks. I also just found this link. http://www.drivetrain.com/parts_cata...arts/jeep.html

According to this the 93 zj has 242 with the 1.55 So should that just drop right in?
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post #1808 of 3196 Old 11-02-2013, 03:15 PM
comptiger5000
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Quote:
Originally Posted by iann32 View Post
Ok thanks. I also just found this link. http://www.drivetrain.com/parts_cata...arts/jeep.html

According to this the 93 zj has 242 with the 1.55 So should that just drop right in?
93 ZJ with a 5.2 would have a 1.55" input, 4.0 should be a .84" input (with collar, I think), 4.0 / AW4 combo might be a .75".
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post #1809 of 3196 Old 11-02-2013, 04:07 PM
iann32
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Quote:
Originally Posted by comptiger5000 View Post
93 ZJ with a 5.2 would have a 1.55" input, 4.0 should be a .84" input (with collar, I think), 4.0 / AW4 combo might be a .75".
Ok thanks looks like ill just grab an older 242 and hope for the best amd probably swap inputs. Ill atleast have plenty of time to do it being how I'm planning to get and rebuild it over the winter and install during the spring.
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post #1810 of 3196 Old 11-14-2013, 02:12 PM
iann32
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Ok so I decided to go with a 231 and found one for 60 bucks. It has a 95 build date and is from a zj but mine in my zj has an early 94 date . My questionis does anyone know if that will just drop in or am I going to have to build a hybrid case due to different input shaft lengths and gear cut? I'm going to get the case regardless because i can just turn around and sell it.
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post #1811 of 3196 Old 11-14-2013, 02:40 PM
OverlandZJ
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Quote:
Originally Posted by iann32 View Post
Ok so I decided to go with a 231 and found one for 60 bucks. It has a 95 build date and is from a zj but mine in my zj has an early 94 date . My questionis does anyone know if that will just drop in or am I going to have to build a hybrid case due to different input shaft lengths and gear cut? I'm going to get the case regardless because i can just turn around and sell it.

Doesn't appear that way.. taken from first post:

93-95 V8 ZJ's: 46RH transmission, 1.55" 23 spline input shaft
93-95 I6 ZJ's with the 42RE: .840" 23 spline input (with collar)

You have a 5.2 if your details are correct, and as far as I know the 231 was only available in a 4.0L ZJ.

You also cant build a "hybrid" case, that's considered the 249/242 method where they share the same front case half. The 231 case half doesn't swap..

Now, do some research and see if there was a 231 in something with a 1.55" input. Then you could mix parts to get around the gearcut/input issue.
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post #1812 of 3196 Old 11-14-2013, 03:04 PM
iann32
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Quote:
Originally Posted by OverlandZJ View Post
Doesn't appear that way.. taken from first post:

93-95 V8 ZJ's: 46RH transmission, 1.55" 23 spline input shaft
93-95 I6 ZJ's with the 42RE: .840" 23 spline input (with collar)

You have a 5.2 if your details are correct, and as far as I know the 231 was only available in a 4.0L ZJ.

You also cant build a "hybrid" case, that's considered the 249/242 method where they share the same front case half. The 231 case half doesn't swap..

Now, do some research and see if there was a 231 in something with a 1.55" input. Then you could mix parts to get around the gearcut/input issue.
Ok. Thanks for the info. Wasnt sure if you could build a hybrid with only the 242 but now I know. My search continues
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post #1813 of 3196 Old 11-14-2013, 04:26 PM
Dekronic03
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Ok so I've been reading a lot of different post and my conclusion is that as long as I find a TC the same year and engine it should be a direct fit? I have a 93 ZJ 4.0 AW4 with a NP249 and it just won't stay in 4hi so I want to swap it out and would only have a day since it's my dd. I found a ZJ the same year with a NP242 but it's a 5.2 would it still be a direct fit?
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post #1814 of 3196 Old 11-15-2013, 04:02 AM
ejschultz
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Assuming the PO did the swap correctly, he would have had to get that 242 from a 96-98 ZJ so it'd have the correct in put length. If that's the case, no. It's not going to be a direct fit. You'd have to swap the inputs.

97 ZJ - 5.2L, 242, 4" IRO lift w/short arms & adj. TBs, JKS Discos/BPEs, DT3000s, Aussie'd 44A, sliders, bumpers, bunch o' skids, 31" Duratracs on 15x8s
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post #1815 of 3196 Old 11-16-2013, 04:35 PM
iann32
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Would anyone know if this would be a long input shaft?
http://m.ebay.com/itm/181261310190
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