Id like to know what would be the best fluid I can run in the AX-15 or what at least is Recommended, Id also like to know the same thing for the NP231, I've been told Auto trans. fluid but Ive herd alot of mixed discussion on what type to use and never really got a clear answer to either of these questions. If anyone knows on whats recommended/best to use let me know, thanks agian in advance guys.

 

Bump.

 

I DON't know what to run in the AX15.
I DO know what to put in the NP231. Use Dexron Trans Fluid. It can be Dexron II, or III or IV etc, as long as you use Dexron. Drain the old (pull the lower hex head plug), fill in the new till it runs out the fill hole (upper plug). I have a long thin tube that goes on a litre container, it makes the fill easier, have used a hose fastened to a cap also in the past. Perhaps google for tech manual on the AX trans. Good luck.

 

I use 75W-90 API GL-3, in my AX-15

make sure you get GL-3 and not 4 or 5

they arent yellow metal friendly and can cause your synchros to prematurely wear

 

Cool. Now we know the good stuff.

 

Alright, thanks for the info I really apperciate it, Would you happen to know any other fluid that you can run in the trans? And would royal purple be worth the money if I bought there gear oil/trans fluid?

 

Thanks, really apperciate it. Ill be going to go pick up some dexron for my transfer case tomorrow then.

 

Alright so I found after about 15 minutes of searching that GL-3 Is discontinued and You cant find it anywhere except over seas. So my options are GL4/5 and MT-90, Aparently MT-90 is the best thing that you can run in the AX series trans, or so ive read. But I cant seem to find anything else that will work except for possibly royal purple. Ive also read that you can run Engine oil in your trans as well?

 

I can tell you that Royal Purple has been phenomenal in my SRT4 trans and my Prelude's tranny. I also have had great success with it in my Power Wagon and SRT8's transmission. If it can go in the Jeep's, I will be happy as hell.

Call Royal Purple and see what they say. Someone usually answers the phone there on the first ring.

 

I just did some research on their site and found this for our jeeps, Its odd that the Dakota's call for the Syncromax and for our cherokee's it calls for regular gear oil? Heres the link to it:

http://www.royalpurple.com/transmission-chart.html

 

Still confused. It says;
Jeep 1984 - 1987 T4 & T5 (Mopar PN04874464) Synchromax
Jeep 1984 - 1996, all others (n/a) Max-Gear 75W90
Jeep 1997 Cherokee (GL-3, 75W90) SAE 10W40 / XPR 10W40
Jeep all others Max-Gear 75W90
Jeep 1998 & newer, except NV3550 SAE 10W40 / XPR 10W40
Jeep NV3550 (Mopar PN04874464) Synchromax

 

Thats what im wondering. I just tried calling them and found out their closed until 8, tomorrow. Ill have to call sometime tomorrow morning and then ill post agian about what royal purple recommends but from the looks of it you can run it in your transmission, auto or manual.

 

Love to hear it. Mine is a 99 so I'm guessing we both can run the same thing.

 

Yep, as soon as I get an answer tomorror ill post it and hopefully it help anyone else out who's wondering the same thing about trans fluid.

 

I used redline mtl in my ax15 with good results. I got it at www.myoilshop.com