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Unread 05-09-2013, 02:23 PM   #1
01xjltd
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np 242 swap question

I am in the process of changing out the 249 transfer case in my 96 zj to a np 242. the 249 case had an internal slip yoke and the 242 case has the external slip yoke for the rear shaft. How much do you have to shorten the rear driveshaft ?

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Unread 05-09-2013, 03:47 PM   #2
ratmonkey
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as much as you have to shorten it.
anywhere from .5" to 1.5" depending upon lift and other considerations. measure when you get it in there.
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Unread 05-09-2013, 08:29 PM   #3
paintballwannab
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Take off a little at a time, till you get it to where you want. I had mine off 4-5 times till I got it to set where I wanted.
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Unread 05-09-2013, 09:34 PM   #4
ratmonkey
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Quote:
Originally Posted by paintballwannab View Post
Take off a little at a time, till you get it to where you want. I had mine off 4-5 times till I got it to set where I wanted.
that's not how you shorten a shaft correctly. you cut the yoke off the tube, cut the tube, and weld it back together.
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Unread 05-10-2013, 10:52 AM   #5
paintballwannab
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Quote:
Originally Posted by ratmonkey View Post
that's not how you shorten a shaft correctly. you cut the yoke off the tube, cut the tube, and weld it back together.
Who said that's not how I did it. I cut the yoke off, put it on the output and cut the tube down a little at a time till I got it where I wanted it.

I did have to get it balanced by a local shop afterwards though, was hoping I could get by without having to do that but oh well.
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Unread 05-10-2013, 02:39 PM   #6
ratmonkey
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i've built 5 or 6 driveshafts and a tape measure has never failed me. no need to go through all that trouble.
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Unread 05-10-2013, 02:43 PM   #7
paintballwannab
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They're over rated...I can't read anyway haha.
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