NP231 fluid capacity -
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Go Back > General Technical Discussions > Engines & Drivetrain > NP231 fluid capacity

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Unread 12-07-2009, 09:34 AM   #1
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1997 TJ Wrangler 
Join Date: Nov 2009
Location: NB
Posts: 3
NP231 fluid capacity

So here's a question for the guru's. What is the fluid capacity of the NP231, I looked here and found 1.1 quart, but other sites say 2 quarts. What is the correct answer? I got 2 quarts in mine before it came out the hole.

I like it with the grass cut low, big mountain tops, the valley below
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Unread 12-07-2009, 12:55 PM   #2
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1990 YJ Wrangler 
Join Date: Nov 2009
Location: The southern armpit of California
Posts: 2,098
Haynes manual says 3 pints (1.5 qts) for the NP231. Last time I changed my NP231 fluid it took about this much, maybe a little more. It may depend on how much you get to drain out. 1-2 quarts seems to be the range.

In any case, the correct level is up to the fill hole. Make sure you are on level ground or you may get a false fluid level.
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