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Old 09-21-2012, 09:50 PM   #1
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97-98 Transfer Case

Am I correct in saying that the manual and sutomatic transmissions in the 97-98 TJ's used the same transfer case? I was looking online and could only find the one transfer case model for the both transmissions.

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Old 09-21-2012, 09:55 PM   #2
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Originally Posted by James 97TJ View Post
Am I correct in saying that the manual and sutomatic transmissions in the 97-98 TJ's used the same transfer case? I was looking online and could only find the one transfer case model for the both transmissions.

You are correct, it was the NP231J. It was used in a lot more years.

You just have to get the right spline count on the shaft

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Old 09-21-2012, 10:03 PM   #3
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So the spline count may be differnt on a 98 say the manual is 23 the automatic might be 26 or something?
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Old 09-21-2012, 10:05 PM   #4
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So the spline count may be differnt on a 98 say the manual is 23 the automatic might be 26 or something?

To be honest, I'm not 100% sure. I do they that the NP had different spline counts(I just don't know what went with what).
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Old 09-21-2012, 10:23 PM   #5
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I am looking to swap out my manual transmission for the 3 speed automatic so that my wife can drive the jeep (dont ask lol) if i get the automatic transmission I can use the transfer case but would have to get a new drive shaft? or do I have it abckwards lol
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Old 09-22-2012, 07:48 AM   #6
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James, the transfer case's input shaft diameter (spline count) and length varies by the type of transmission it is bolted to.

Your conversion from a manual transmission to the 32RH 3-speed automatic for your '97 TJ means your transfer case input shaft will be too short to seal the new automatic transmission's output shaft which means the new automatic transmission will leak ATF like a sieve. There is an easy fix for that which involves installing an extended output shaft seal into the new automatic transmission that will effectively seal it without any additional modification needed at the transfer case. Just seat it into the rear of the new automatic transmission before you install it and life will be good. The old rear seal can be removed with a pair of pliers which is easily done.

The extended output shaft seal for your new automatic transmission is available from http://www.teraflex.biz/automatic-seal-extension.html

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