Speedo whoes

THe speedo gear is on the transfer case. So as long as you maintain the same t-case, you should be good.
 
I could be wrong ,but I thought they(NP231s) all had the square end that goes into the speedo housing on the transfer case. You could check into gettin a GM speedo cable and see if it fits your YJ speedometer. Or check into Advance Adapters, they have alot of that stuff.
 
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