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NP231 Oil pump?

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Old 03-08-2019, 03:01 PM
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Engine: 4.0
Default NP231 Oil pump?
What exactly is the purpose of the Oil Pump in an NP231? I get the obvious "it moves oil around" but to what and how? It just floats on the rear output shaft and doesn't seem to line up with any ports. So does it just "spray" oil at the rear chain? Seems rather pointless (though I'm sure it's not). I'm asking only out of curiosity/desire to understand.
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Old 03-11-2019, 07:26 PM
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I think it moves oil around by spraying oil at the chain..
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Old 03-11-2019, 07:37 PM
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It pumps oil up to the top of the tcase and forward to the planetary gears
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Old 03-11-2019, 09:46 PM
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Considering how tough these xfer cases are and how long the same basic design has been used, I'd say the design is pretty dang good.
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