dkmcgowan Posted December 17, 2015 Share Posted December 17, 2015 So I did a swap to manual and my friend that did it for me put the same fluid in the NP231 as the AX15. He says he always thought you match the transfer case to the transmission fluid. But I've read you always put Dexron III in an NP231? It's working, it shifts a little hard. I hope it didn't hurt anything, only been 2 weeks running this way... What fluid should be in an NP231 that is attached to an AX15? Link to comment Share on other sites More sharing options...
87MJTIM Posted December 17, 2015 Share Posted December 17, 2015 NP231 should get ATF Link to comment Share on other sites More sharing options...
dkmcgowan Posted December 17, 2015 Author Share Posted December 17, 2015 Anything special? Just ATF3? I know with gear oil all the GL3 vs GL5, etc... on gear oil. nothing special with ATF3? Link to comment Share on other sites More sharing options...
87MJTIM Posted December 17, 2015 Share Posted December 17, 2015 A FSM for a 93 XJ says to use Mopar ATF Plus, type 7176, or Dexron II. Approx. 1 qt. I don't know if DII and DIII are compatible. Link to comment Share on other sites More sharing options...
64 Cheyenne Posted December 17, 2015 Share Posted December 17, 2015 Dexron in the TC, 30Wt synthetic in the tranny. Link to comment Share on other sites More sharing options...
dkmcgowan Posted December 17, 2015 Author Share Posted December 17, 2015 Dexron in the TC, 30Wt synthetic in the tranny. I ordered some of that redline mt 90 for transmission, read a lot of good things about it. I will drain transfer case and add some dexron ii Thanks Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted December 17, 2015 Share Posted December 17, 2015 Dex/Merc II or III in the T-case. It won't hurt you to run ATF in the T-case, since it's not there for hydraulic purposes. It's used to lube the chain, sprockets, etc. Redline MT-90 in the AX-15 is most desirable. I run it and it is great! Just whatever you do, do NOT put anything past GL-4 rated. Do not follow any factory service manuals that tell you to replace it with GL-5 or higher. The sulfur used in GL-5 and up will eat the bronze/brass synchronizers up. Link to comment Share on other sites More sharing options...
dkmcgowan Posted December 17, 2015 Author Share Posted December 17, 2015 I bought the redline mt 90 for ax15 and I got mopar atf+4, which supercedes the mopar plus 7176 stuff the fsm called for for np231 Link to comment Share on other sites More sharing options...
Crash Posted December 18, 2015 Share Posted December 18, 2015 FWIW, I run Amsoil Universal ATF in my AW4 and T-case. I have als oused Dex/Merc and ATF+4 in the t-case with no ill effects. Link to comment Share on other sites More sharing options...
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