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Is this input shaft .750" or .840"

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Old 05-16-2011, 05:17 PM
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Default Is this input shaft .750" or .840"

I would say it is closer to .750", they made both lengths for this transfer case. I don't want to buy the wrong one.
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Attached Thumbnails Is this input shaft .750" or .840"-input-shaft.jpg  
Old 05-16-2011, 05:21 PM
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I gonna say it's closer to .840
Old 05-16-2011, 06:42 PM
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Now it looks like 13/16" or .8125".........probably a .840"

So where is it supposed to be measured from?

Last edited by ny_driver; 05-16-2011 at 06:45 PM.
Old 05-16-2011, 10:57 PM
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Are you swapping out the 249? Which engine do you have and year?
Old 05-16-2011, 11:11 PM
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just swap the inputs and buy a rebuild it while your in there
Old 05-16-2011, 11:26 PM
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Originally Posted by posjeepxj
just swap the inputs and buy a rebuild it while your in there
Best thing to do
Old 05-17-2011, 05:38 AM
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Engine-I6 1993, and yes I'm getting rid of the 249 and installing a 242. I'll try to find one that bolts right in, but I'll rebuild it if I need to.

Thanks.

Last edited by ny_driver; 05-17-2011 at 06:12 AM.
Old 05-17-2011, 12:26 PM
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Found a NP242J w/ .750" shaft 30 miles away..............just hope it has the right style gearcut.

I couldn't figure out where the build date was on the case when I looked at it. Now I know I'll go back and look.

This is a guide to show you how to determine the build date and it shows you how to measure the length of the input.
http://www.lunghd.com/Downloads_and_...tification.pdf

Last edited by ny_driver; 05-17-2011 at 12:31 PM.
Old 05-17-2011, 03:05 PM
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Any case made before mid 94 will work, don't get one after that date if you plan on swapping the input shaft cause it will basically eat itself. There should be a small circle tag on the rear of the case that says the manufacture date
Old 05-17-2011, 04:23 PM
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He said it's the newer style with the different driveshaft and I think it will have the different annulus gear. Guess I gotta keep looking.

Last edited by ny_driver; 05-17-2011 at 09:15 PM.
Old 05-17-2011, 04:26 PM
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That sucks man.
Old 05-17-2011, 09:31 PM
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Maybe if I do the front case swap it'll work. The driveshafts are there also.
Old 05-17-2011, 09:35 PM
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Honestly if the input shafts are only off a tenth of an inch I would just swap the whole case. A tenth of an inch to short will not hurt anything
Old 05-17-2011, 09:42 PM
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The shaft is the right length, but they changed the gearcut in mid 1994.

What were you saying about it eating itself?
Old 05-17-2011, 10:40 PM
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It will only eat itself if you mix parts in a case between the gear cut change. If you put the whole case in without swapping internals it will be fine
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