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Old 05-03-2013, 08:38 PM
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4x4Dad 4x4Dad is offline
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What's involved in NP229 --> NP242 swap?

My 229 transfer case just imploded, right after I passed smog (the Jeep gods know I got a bit of tax money back this year). As I drove home in 2wd, it sounded like my kids eating hard candy near a PA system. Quite ugly.

I've got a line on a local NP242 with SYE from a Grand Cherokee. I've confirmed its a 23 spline, so I think it should bolt up to my TF727 okay.

But I'm not sure what I need to do beyond that.

I've read nearly every forum thread on NP242s, but I'm feeling in the dark still, so i felt I needed to post a thread. I know the rear drive shaft will need an adapter, at minimum, to bolt to the SYE, but will I have to buy an all new shaft? Is there an adapter that will allow my stock rear shaft to bolt up? Is there an XJ or ZJ shaft that I could use instead? (I'm assuming not because of the slip yoke feature, but I'd love to be corrected.)

What will I have to do differently to the front shaft?

A reman 229 is out of my budget range (upwards of $800 with tax), whereas the 242 with SYE is local and only $250.

Any insight/advice/experience you can provide would be great.
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88 GW, AMC 360 with Doug Thorley headers, Howell TBI, NP242, TF727, 3.31 gears and the tow package, Magnaflow muffler and cat, BJ's 4" springs + 2" blocks and 1" shackles, and 1" body lift, 32" BFG's, aluminum rad, K20 front brake calipers.
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Old 05-03-2013, 09:17 PM
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The 242 will probably have a different clocking to it so it will most likely hang lower.

Depends on the style SYE as to what type of shaft end you need to bolt it up.

Your shaft might be fine. The 242 is smaller than the 229 and shorter if I remember correctly so at most you'd need to have a new shaft made up or find a longer one and have it cut down. The front shaft should be fine unless it's out of a newer GC with the double CV front shaft. Then you will need to find an older style front output yoke.

You will need to do some shifter linkage mods to get it to shift with your current flag shifter.

You might be better off just finding a used 229 or 228 to swap in. They are cheap. I've never gotten more than $50 for the used ones i've sold. And they were all good.
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Old 05-03-2013, 09:51 PM
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AFAIK the NV242 Jeep front output yoke is the same as the NP229 so front should be fine.

If it has a slip yoke eliminator already you would bolt up the rear driveshaft the same way only issue would be length.

I have a longer rear shaft from a QT rig so if you do it and need a longer one...hit me up I'm fairly close probably ~70 miles.
http://www.ifsja.org/forums/vb/showthread.php?t=163306
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Old 05-03-2013, 10:29 PM
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Thanks, guys. I'm going to pull the trigger I think and get the 242. I'm under a little time crunch, and 229s are nowhere to be seen around here. Besides, the 242 is a bit more popular and easy to manage repairs/upgrades/etc. And no VC to worry about.

I'll have to figure out the speedo cable adaptation, as well, but I don't worry how fast I'm going. I'm usually more concerned with how slow.

Tony, I will definitely keep that offer in mind as I do the R&R. I appreciate it.
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88 GW, AMC 360 with Doug Thorley headers, Howell TBI, NP242, TF727, 3.31 gears and the tow package, Magnaflow muffler and cat, BJ's 4" springs + 2" blocks and 1" shackles, and 1" body lift, 32" BFG's, aluminum rad, K20 front brake calipers.
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Old 05-04-2013, 06:03 PM
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4x4Dad 4x4Dad is offline
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Bought it. Now I've got to install it.

As a nerdist academic, I'm going to think it through, buy what I need, take some pics, and perhaps post an overly verbose write up.
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Tucker

88 GW, AMC 360 with Doug Thorley headers, Howell TBI, NP242, TF727, 3.31 gears and the tow package, Magnaflow muffler and cat, BJ's 4" springs + 2" blocks and 1" shackles, and 1" body lift, 32" BFG's, aluminum rad, K20 front brake calipers.
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Old 05-04-2013, 06:25 PM
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Did you see the post for a NP129 for $75?
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