How often do you guys chane out the np231 tcase fluid? And which to use? - Jeep Wrangler Forum
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Old 04-25-2015, 01:56 AM
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How often do you guys chane out the np231 tcase fluid? And which to use?

How often should the tcase fluid be switched out? And what oil should be used? 93 yj automatic ,, thanks

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Old 04-25-2015, 10:20 AM   #2
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I change mine once a year

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Old 04-25-2015, 10:41 AM   #3
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I do all my fluids once a year. Unless I have been in alot of water then I will check and change if there is moisture or crud present. Atf +3 for 99 n older I believe.
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Old 04-25-2015, 10:49 AM   #4
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Dextron II or III Is fine too.
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Old 04-26-2015, 08:58 PM   #5
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I use ATF+4. Easier to carry spare fluid for me and other Jeeps on the trail. The +4 is backwards compatible. I can also use the +4 on my tow rig.
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