Jeep Wrangler Forum banner
  • Hey everyone! Enter your ride HERE to be a part of JUNE's Ride of the Month Challenge!

1 - 6 of 6 Posts

·
Registered
Joined
·
18 Posts
Discussion Starter · #1 ·
Hello,
95 wrangler 2.5 manual transmission.

I am performing a drain and fill on the transmission and the transfer case tomorrow.
Im using 75W-90 (80W-90 actually) in both the transmission and the transfer case.

I have read numerous posts recommending ATF exclusively in the transfer case.

My Chilton manual reads: "Use the same viscosity oil as in the transmission".
But.. the next paragraph reads:
"Remove the fill plug, then fill the transfer case (both the NP-207 and the NP-231 use dexron II transmission fluid.")
Chiltons manual sort of contradicts its self.

Since my transmission requires 75W-90...thats what I plan on using in the transfer case.

If anyone has other recommendations, please let me know.
Thanks
 

·
Registered
Joined
·
14 Posts
You want regular good ol' ATF in your transfer case. Don't go by what Chilton's says.

Additionally, Jeep has updated their fluid recommendations. Both the AX-5 and AX-15 now call for 10W-30 for the transmission. Regular dino oil will be fine.
 

·
Registered
Joined
·
36 Posts
run 10w30 in the transmission, wow Ive never heard of that. Im glad I read this post about this.
 

·
Registered
Joined
·
402 Posts
You actually can run about any lightweight oil in ether the trans or transfer case. The heavier (like gear oils) the oil the worse it is for both. I like ATF, but I also change mine 4-5 times a year because I am in a lot of mud and creek crossings almost every week...
 

·
Registered
Joined
·
18 Posts
Discussion Starter · #6 ·
Ok thanks,
I returned the 80W-90 gear oil.

Went to W-mart.
I purchased Super Tech full synthetic 10W-30 oil for the transmission.
The 1 gal container reads "API service SN, SM, SL, ILSAC GF-5 and GF-4.
I believe that 80W-90 gear oil is GF-5.
The main difference that I have learned since my original post is that
Gear Oil (GF-5) is corrosive to brass or is unfriendly to yellow metal..the AX5 and AX15 trnasmission syncro gears are brass.
Manual transmission = 10w-30

For the transfer case I purchased Super Tech ATF
ATF label reads "suitable for use in vehicles requiring Dexron II, Dexron III and Mercon fluids."

Bought a Fluid Pump at Harbour Freight to make the fill job easy.

Thanks
 
1 - 6 of 6 Posts
Top