np231 transfer case oil pump???
03-31-2018, 09:38 AM
#1
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Year: 1997
Model: Cherokee
Engine: 4.0
np231 transfer case oil pump???
I have a 1997 Cherokee with auto trans, about 120,000 miles on it and the chain needs to be replaced. Should I go ahead and install a new oil pump in the transfer case or wait till next time. Thanks
03-31-2018, 08:37 PM
#2
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Year: 1995
Model: Cherokee(XJ)
Engine: I6 4.0L
I would replace everything that is reasonable to do when you have it apart. This is just my general policy for everything.
I wasn't aware the NP231 had an oil pump - I thought the chain and gears spinning was the only thing that moved the fluid - kind of like the differentials.
I wasn't aware the NP231 had an oil pump - I thought the chain and gears spinning was the only thing that moved the fluid - kind of like the differentials.
04-01-2018, 12:04 AM
#3
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix
If it is cheap enough you could go ahead and replace it, but I don't think its necessary. its a pretty simple piece and not really high pressure from what I can tell.
04-01-2018, 12:46 AM
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Year: '98
Engine: 4.0 I6
I didn't bother when I did my SYE at 270K miles. My chain was not stretched or anything so I left it as well.
But it's not going to hurt to replace it I guess.
But it's not going to hurt to replace it I guess.
04-01-2018, 07:55 AM
#5
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Year: 1998
Engine: 4.0
Unless there is evidence of abnormal wear on the gears/teeth, I personally wouldn't be concerned with replacing it. I would, however, replace the little filter, any seals that are dry/hard and definitely the range fork pads while in there
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