Quadratrac transfer case - JeepForum.com
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post #1 of 4 Old 12-23-2001, 01:11 PM Thread Starter
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Quadratrac transfer case

How difficult would it be to change out the quadratrac (NP249) transfer case to a NP242 or NP231. Would either of these 2 bolt straight into the tranmasiion? I own a 94 ZJ with the 5.2L engine. Would any driveshaft mods be needed, or any axle mods needed?

Thanks , Scott

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post #2 of 4 Old 01-06-2002, 01:38 PM
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Both will bolt right up.

Driveshaft mods will probably be needed as well as shift linkage mods.

But this is a great swap and easier than most think.

The 231 is cheaper, but I would go for the 242 if I were you, unless it never snows where you are. Not having the ability of full-time 4wd is lame IMHO.

1998 5.9L
6", 35's, Detroit/OX, L10, 4.56, Warn 9500
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post #3 of 4 Old 01-07-2002, 03:06 PM
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1976 CJ7 
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Wharf is right with some caveats...

You need the correct input shaft length for the bolt- up. The front output yoke needs to be from an XJ or a ZJ if you use the 231- the double cardan wont fit in the yoke of a TJ case. Also, your VIC won't work w/ the 231- the switch won't make it function, although it will work with the 242. I did not have to lengthen the driveshafts in my 231 swap, but any lift would require changes here. The linkage will require some field engineering to work on the 231, I don't know about the 242.

Good Luck

'05 GMC Envoy XL SLT
'05 F250 CC XLT 4x4
'08 535XI
'76 CJ7 project
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post #4 of 4 Old 01-07-2002, 07:33 PM
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That is true. I totally spaced on the fact that there are tow different input shaft styles.

As far as the VIC goes.....yeah that is true if it really matters to you. I don't have a whole lot of use for it, and that helps lend some back to the fact that the 242 is a better swap anyway.

1998 5.9L
6", 35's, Detroit/OX, L10, 4.56, Warn 9500
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