TH-350 to NP-241 Adapting issue. HELP - JeepForum.com
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Unread 09-17-2012, 08:32 PM   #1
RubiExpressTJ
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TH-350 to NP-241 Adapting issue. HELP

Doing a 350/ TH350/ NP241 swap in my YJ. I have the Motor and Trans already in. The TH350 was originally mated to an NP203 transfer case making the output shaft on the trans only 3/4 of an inch beyond the housing, and the incorrect bolt pattern to mate with the NP241. I've already installed the standard length slip yoke eliminator on the 241. My boss is running this same set up in his YJ but has a spacer or adapter correcting the bolt pattern. What I'm not sure about is the length of his trans. output shaft. I need to know if there is a spacer/adapter that I can use with the short output shaft of the transmission to get the transfer all bolted up!? I can't find any answer to this question online and it's beginning to look like the only route is to change out the output shaft on the transmission and I'm not too into that idea considering it's already in the Jeep. Maybe someone on here as made their own adapter and can give me some ideas? In a real pickle here!

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Unread 09-18-2012, 07:18 AM   #2
jason m
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Ive had that combo apart in the the past ( TH-350-203 ) and yes its a very short tail on the TH-350, there is no way I see getting a 241 to mate up with factory parts unless you change that tail shaft.
Theres just no enough meet on the end of the tail to make it happen.

Jason.
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Unread 09-21-2012, 10:54 PM   #3
ltrail
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Novak has an adapter but it's $$$. I was originally planning on th350 but went 700r/241c the combination was cheaper to buy and rebuild than the adapter kit.
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Unread 09-21-2012, 11:50 PM   #4
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Quote:
Originally Posted by ltrail View Post
Novak has an adapter but it's $$$. I was originally planning on th350 but went 700r/241c the combination was cheaper to buy and rebuild than the adapter kit.
This, better first gear all factory parts and only about 3"s longer than that 350 trans.
I run one and its a killer combo, very hard to break.

Jason.
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1993 YJ 4.0 60 Front, Rear steer 60, bolth spooled, 5.38's, 700r/241 39.5 iroks and beating it like it owes me money.

And on the 8th day, God created the 14 bolt....
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Unread 09-22-2012, 02:01 PM   #5
RubiExpressTJ
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Picking up an NV3500 tonight! I prefer a 5 speed anyway. Was only going to use the TH-350 because of how cheap it was. Should of done my homework. Live and Learn
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Unread 10-25-2013, 08:07 AM   #6
Johnboy2892
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SB350/Th350/np241c

I am currently working on building my own adapter. I took dimensions from my np204 and my np241c adapters and building a new one. Taking the size of np204 and putting the np241c case holes. Hoping this works out!!
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Unread 10-26-2013, 01:24 PM   #7
Powerplay72
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Jason, I just finished up the same combo you have. I put a '91 700r I rebuilt, to a Level III, behind my 1969, carbureted 350 and could not be happier. Super fast, and smooth shifting... Did I mention OD!
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