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-   -   Gearbox and Diff. oil question... (http://www.wranglerforum.com/f218/gearbox-and-diff-oil-question-73681.html)

Chadtonio 12-28-2010 03:12 PM

Gearbox and Diff. oil question...
 
I was at Jiffy lube the other day for an oil change cause I was lazy and in a rush and asked them how much to change the gearbox oil they quoted me $100! So I am going to be doing that myself! Just curious how much I need for both that and the diff...Might as well do that while I am making a mess...Thanks!

Mike_3303 12-28-2010 03:15 PM

See if this helps, what oil you going to use?

Jeep NV3550 Transmission & NP231 Transfer Case Service

JeepAddOns-Chris 12-28-2010 04:39 PM

Add a few cans of brake cleaner and a tube of RTV sealant to your shopping list as well if you're doing the diffs. Any 80W-90 weight gear oil should do unless you have a limited slip. I'm pretty sure both the D30 and D35 both use about 1.5 quarts.

For the transfer case, use ATF and for the AX-15 or AX-5, use 10W30 motor oil.

Garyk 12-28-2010 09:28 PM

I use the purple stuff in the trans, 75/90 GL5...works great and in the transfer I use synthetic trans oil.....make sure you use one for Chrysler products

Mike_3303 12-28-2010 09:40 PM

Quote:

Originally Posted by Garyk (Post 951303)
I use the purple stuff in the trans, 75/90 GL5...works great and in the transfer I use synthetic trans oil.....make sure you use one for Chrysler products


purple stuff? are you talking about royal purple? if so good job lol i used that in the trans, transfercase, front and rear axle. kinda pricy but good.

LaterJim 12-29-2010 09:56 AM

+1 on royal purple...I use Redline MT90 in the tranny...good stuff, but shifts pretty stiff in the cold weather until warm

GrNMoNsTr--93YJ 12-29-2010 02:33 PM

I've also got this same question. I was told when I got the Jeep to use 80w90 gear oil for the 4x4 t case to make it stay in gear and not slip out. But when I asked on here a while ago I got everything from ATF to Synthetic lube. The guy I got it from showed me a nut to remove right in the center of the Jeep and then told me to put the gear oil but I don't want to put that in if I would be better off putting a different fluid in and if there is an easier way to pump it in since the bolt is off the side of the case. Thanks guys. If you need I'll post a pic where he told me to put the gear oil in at and show the bottle of G.O. he gave me to put in it.

jgwalt 12-29-2010 02:52 PM

Quote:

I use the purple stuff in the trans, 75/90 GL5...works great and in the transfer I use synthetic trans oil.....make sure you use one for Chrysler products
agreed. max gear is dope. The synthetic ATF is the +4, I believe.

JeepAddOns-Chris 12-29-2010 02:58 PM

No no no, do *not* put 80W90 in your transfer case. Maybe he meant to use that stuff in your transmission, but Chrysler issued a TSB update to use 10W30 oil in your manual transmission.

NP231 = ATF
AX-15/AX-5 = 10W30 Oil

GrNMoNsTr--93YJ 12-29-2010 03:04 PM

I've got an automatic tranny but it has the manual gear shifter on the floor for the 4 wheel drive. Auto tranny shifter is on the column. Where would I put the gear oil in for the manual 4wd shifter? He showed me a bolt underneath which is pretty much centered on the underbody of the jeep.

jgwalt 12-29-2010 03:09 PM

Quote:

No no no, do *not* put 80W90 in your transfer case. Maybe he meant to use that stuff in your transmission, but Chrysler issued a TSB update to use 10W30 oil in your manual transmission.
I run 75-90 in both diffs and transmission. ATF +4 in the transfer case. Is there something I'm missing...?

Garyk 12-29-2010 04:29 PM

TSB for 10w30? I can't imagine what they were thinking.....engine oil simply does not have the shear properties that synthetic gear oil or regular gear oil does.

falatude 12-29-2010 04:45 PM

Quote:

Originally Posted by JeepAddOns-Chris (Post 950743)
Add a few cans of brake cleaner and a tube of RTV sealant to your shopping list as well if you're doing the diffs. Any 80W-90 weight gear oil should do unless you have a limited slip. I'm pretty sure both the D30 and D35 both use about 1.5 quarts.

For the transfer case, use ATF and for the AX-15 or AX-5, use 10W30 motor oil.

I read somewhere else as well to use 10w30 instead of the 80x90, Hmmm :confused:
Seems a bit shaky to me

Garyk 12-29-2010 05:17 PM

Did some research on the internet and came up with part#4761839AC(new part number) I then called the local Jeep dealer and asked them to search the number. Its a number for transmission oil and its 10w-30 for jeep transmissions..

Guess the royal purple is coming out this week and synthetic 10w-30 is going in...

Garyk 12-29-2010 05:19 PM

Also read that some of the gear oils have too much sulphur in them because of gear shear and its bad for brass....

falatude 12-29-2010 05:35 PM

Quote:

Originally Posted by Garyk (Post 952929)
Did some research on the internet and came up with part#4761839AC(new part number) I then called the local Jeep dealer and asked them to search the number. Its a number for transmission oil and its 10w-30 for jeep transmissions..

Guess the royal purple is coming out this week and synthetic 10w-30 is going in...

I am going to keep digging on this one. I searched every TSB ever issued for my 92 YJ with the AX-5 trans and came up with NOTHING related to the oil used in the tranny:confused:
Once I have my spare tranny sitting in the garage I will be more willing to experiment:eek:

http://www.alldatadiy.com/TSB/04/920406d8.html

falatude 12-29-2010 05:47 PM

Ok, found this on "Bob Is The Oil Guy" web site. Site is dedicated to oil analysis.

"Hi Joe,

I love 5-speeds, but frankly the one used in pre-2000 Cherokees isn't all that great (Aisin AX-15). It is better than the AX-5 and a Pugeot that Jeep used in the 80s, though. My main gripe with it is that they changed the synchros in about 1996 so that it REQUIRES GL-3 oil, just as GL-3 oil was becoming unobtainium. It also needs a 90-wt oil, so you can't use ATF. I tried Redline MT-90 (GL-4, about the safest gear oil I could find) and within a few months started getting blocked shifts to first gear and other synchro quirks. I went to a Chrysler dealer service department and basically said, "Ok, smart guys, what do YOU use in one of these when it comes in for service?" They pulled their supercede list and TSBs and showed me a paper trail where Chrysler engineers recommend 10w40 synthetic engine oil for the AX-15. So I tried that, and darned if it isn't working well again."

Garyk 12-30-2010 11:57 AM

Quote:

Originally Posted by falatude (Post 952964)
I am going to keep digging on this one. I searched every TSB ever issued for my 92 YJ with the AX-5 trans and came up with NOTHING related to the oil used in the tranny:confused:
Once I have my spare tranny sitting in the garage I will be more willing to experiment:eek:

Automotive Recalls and Technical Service Bulletins for 1992 Jeep Truck Wrangler L4-150 2.5L VIN P MFI. Provided by ALLDATA

I couldn't find any TSBs either....I also looked over the container of Royal Purple, it states that it is non-corrosive

JeepAddOns-Chris 12-30-2010 12:07 PM

Call your local dealer. They'll cross reference what is supposed to go in with their updates and let you know it's ok to use. Or google "10W30 AX-15". Tons of info out there on it. :)

I use regular dino oil 10W30 in my AX-15 and it is smooth as butter compared to the old gear oil I used to use.

falatude 12-30-2010 02:03 PM

I called 2 separate Jeep dealerships in my area, BOTH said 75w90 ONLY! They could find no TSB's stating anything different. All the current manuals in their shops say 75w90 GL-5. Now this was for my 92 YJ, a newer AX-5 might be different. I am not sure. But, with 155k miles on my trans and no issues, I think I will stick with what works.


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