Re: NP207 VS NP231
The 231 and 207 cases are a direct fit... The 231 has a thicker/wider chain/gears and something is different on the lubrication passages (not sure exactly what) but thats about it... There is a gear ratio difference but it is very minimal... If anyone thinks the 231 case is weak, don't, its holding up to over 400+ ponies with 38s... For a supposedly weak transfer-case it is holding up well to my bashing it...
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