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Unread 11-22-2010, 08:24 AM   #1
yogi250cc
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NP231 swap from np241OR

Okay,
I don't want negative comments here. I am just asking for help. I am taking out my 241OR and replacing it with a NP231. I understand that the 241OR has an electronic speedometer on it and the NP231 has a analog speedometer on it. What do I need to do to make this swap?

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Unread 11-22-2010, 08:27 AM   #2
Unlimited04
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the NP231 is really an electronic speedometer. its all electrical signal after the sensor. the NP241OR uses a tone ring, the stock NP231J uses a speedo gear, both send electronic signals to the PCM. the plug should be the same, and it should hook right up. You can also get a NP231J with a tone ring, from www.jbconversions.com ...you'll need an SYE with your lift height anyway.
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Unread 11-22-2010, 08:32 AM   #3
breckboarder55
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IIRC the 231 needs to have a short 23 spline input.

Someone else will probably know better, but you might need a driveshaft since the Rubicon has a shorter yoke? (Possibly wrong)

I want to hear this story...
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Unread 11-22-2010, 09:09 AM   #4
Unlimited04
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Quote:
Originally Posted by breckboarder55 View Post
IIRC the 231 needs to have a short 23 spline input.

Someone else will probably know better, but you might need a driveshaft since the Rubicon has a shorter yoke? (Possibly wrong)

I want to hear this story...
yea, sorta. If the OP has a 42RLE, he'll need the short input shaft (1-3/8" long from shaft face to mounting face). If he's got the manual, it's not an issue...long or short should work. all NV241OR's had short input shafts.

also worth noting you need a newer NP231J, 1996+. Shafts are different before that.
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