NP207 vs. NP231 - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 10-17-2000, 05:06 PM
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NP207 vs. NP231

Does anyone know if the 23-spline input gear from the NP207 is interchangable with the gear from the NP231. Is it the same part number??

Lowrange
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post #2 of (permalink) Old 10-17-2000, 08:58 PM
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Re: NP207 vs. NP231

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Lowrange
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87 Wrangler, 4.2L, Weber carb., HEI, BA-10/5 (but not for long), Procomp lift, Procomp 3000's, Superwinch
post #3 of (permalink) Old 10-18-2000, 08:26 PM
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Re: NP207 vs. NP231

For anyone who needs this info., I found out by taking the NP207 transfer case apart. The two input gears DO NOT match.
I guess I have to buy a 23-spline input gear now. Bummer!

Lowrange
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post #4 of (permalink) Old 10-19-2000, 07:42 AM
 
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Re: NP207 vs. NP231

What is the difference between the two input shafts? NP-207s had 21-spline shafts behind Manuals and 23-spline input shafts behind Automatics. NP-231s were the same way until 1990 I believe, when they all went to 23-spline shafts since the AX-15 replaced the BA-10...

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post #5 of (permalink) Old 10-19-2000, 07:58 AM
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Re: NP207 vs. NP231

The NP-207 input gear is a flat gear and the NP-231 uses a smaller (dia.) helical gear. Otherwise they are the same with respect to the input shaft dia., i.d., and length.

Lowrange
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