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Unread 02-08-2012, 10:11 PM   #1
300zxnovaman
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What kind of gear oil do i use in my ax-15 transmission?

So i have been looking for a while to see what is the best type of oil to put in my transmission and i seem to be getting a lot of controversy as to which oil is okay to put in my transmission.

specs: 97 jeep Cherokee HO IL4.0 with 126,500 miles
it has the 5 speed ax-15 transmission and the 231j transfer case.

I need to know like asap what kind of oil is going to work and wont damage my transmission. Any help would be much appreciated

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Unread 02-09-2012, 10:39 AM   #2
CJ7-Tim
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Cherokee Fluid Capacities


Engine Oil

-2.5L (4cyl) - 4.0 Quarts (3.8L)
-4.0L (6cyl) - 6.0 Quarts (5.7L)

Cooling System

-2.5L (4cyl) - 9.0 Quarts (8.5L)
-4.0L (6cyl) - 10.5 Quarts (9.9L)

Automatic Transmission

-4.0L (6cyl) The AW-4 Automatic Transmission uses Transmission Fluid labeled Dexron-III/Mercon.

- Drain and Re-fill = 4 Quarts (3.8L)
- Filter and complete fluid exchange = 8 Quarts (7.8 L)

-2.5L (4cyl) Chrysler/Mopar Automatic Transmissions use ATF+3 or ATF+4 Type 7176

Manual Transmission

Chrysler now recommends that 10w-30 motor oil be used in Cherokee manual transmissions

-AX-5 5 speed manual - 3.3 quarts 75W-90 GL3 or GL4 (NOT GL5 or GL5 compatible as incorrectly stated in some Owners Manuals)
-AX-15 5 speed manual - 3.32 quarts 75W-90 GL3 or GL4 (NOT GL5 or GL5 compatible as incorrectly stated in some Owners Manuals)
-NV3550 5 speed manual - 2.1 quarts Mopar fluid part # 04874464AA or Snychromax (meets Mopar MS-9224 specs)

The NLGI specs are important - typical NLGI GL-5 gear oil carries added sulphur used as an Extreme Pressure (EP) lubricant. Especially when heated, sulphur is antagonistic to yellow (copper-based) metals - and the synchronizer rings and any bushings in the AX-15 are bronze. Most synthetic gear oils are rated GL-5 and are listed as "safe for use with yellow metals."

Unlike API engine oil specs, NLGI gear oil Service Specifications are not reverse-compatible.

If you want to use a synthetic (RedLine, AmsOil, etc.) either check the back of the bottle or check the manufacturer's website to make sure it's safe for use with yellow metal. Using sulphur-bearing gear oils usually results in draining your synchronizer rings at your next fluid change.

Transfer Case

-NV231 Part-Time (Command-Trac) - 2.2 Pints (1.0L) Dexron III/Mercon

-NV242 Full-Time (Selec-Trac) – 2.85 Pints (1.3L) Dexron III/Mercon

Front Axle

-Dana 30 - 2.5 Pts (1.2L) SAE 75W-90

Rear Axle

-When equipped, Trac-Lok Limited Slip rear axles require 4 ounces of Friction Modifier Additive

-Dana 35 - 3.5 Pints (1.66L) SAE 75W-90
-Dana 44 - 4.0 Pints (1.89L) SAE 75W-90
-Chrysler 8.25 - 4.4 Pints (2.0L) SAE 75W-90

For towing and off-road use SAE 75-140 synthetic
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Unread 02-09-2012, 10:57 AM   #3
slipyoke
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Unread 02-09-2012, 12:24 PM   #4
grainofsalt
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I have used diesel 10w-40 oil with better results than "house brand" 75w-90. (I think that it was a GL-5)
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Unread 02-09-2012, 12:37 PM   #5
dkg4244
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I use 10-30 motor oil. I have about 30,000 on it since I changed it from whatever the PO had in there and I have had zero issues.
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Unread 02-09-2012, 03:02 PM   #6
300zxnovaman
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So i should use 10w-30 motor oil in my ax-15 transmission? is there any kinds you would recommend? and it shouldn't be synthetic right?

I used 80w-90 gear oil when i changed both of my differential fluids. Is that going to be a problem?
I live in Oregon. so i use 4x4 every now and then, and temp can go anywhere from 20 to 90 degrees here.
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Unread 02-09-2012, 05:45 PM   #7
wsar10
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I just serviced my "new to me" AX-15 2 weeks ago I drank the kool-aid and used a VERY stout HD 10-30 with a 1/2qt of 15-40...............
I'm here to tell ya this shouild not be used in a gear box it SEVERLY lacks the proper add-pak for a gear box, I can tell a HUGE diiferance in my gears that is no good.

Do your self a favor and get the correct fluid a GL-4 or 3 rated GEAR oil.I just ordered 4qts of AMSOIL MTG GL-4 today to "re-do" minehttp://www.amsoil.com/storefront/mtg.aspx

REDLINE makes a GL-4, or you can get advance house brand dinno. for like $50 per 5gal bucket.
A gear box needs a fluid with an EP additive and with friction modifiers and a higher visc and pour point than MOTOR oil, compare the 100c and 40c cst of gear oil vs that of a good quality motor oil those number alone tell you motor oil has no place in a gear box..
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


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Unread 02-09-2012, 07:07 PM   #8
N8N
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FWIW Redline's web site recommends MT-90 and while I haven't used it in a Jeep (I have never had/driven one with a MT) I have had excellent luck with it in other vehicles (VW, Porsche, etc.) Much improved cold shifting etc. I agree with the comments that you don't want to use a GL-5. Just because I've used the Redline and it works, it's pretty much my go-to for manual transmissions; I've used the MTL, MT-90, and even Heavy Shockproof with good results. (the last was in a B-W T10 at the recommendation of a drag racer friend; shifting wasn't quite as slick as with MT-90 but according to him it would handle abuse better.)
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Unread 02-09-2012, 07:08 PM   #9
grainofsalt
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I did some looking:

Quote:
"Do not put syncromesh or Syncromax fluids in the AX tranny. Those fluids are for the later NV3550 & NSG 6 speeds. Redline MT-90 or Amsoil MTG, SVG can be used also. The SVG is a GL-5, but being synthetic it will not harm the syncros. Your choice, all 3 are good."
Quote:
97-99 AX-15
Requires 75w90 GL3 (GL4 is compatible, GL5 is NOT)
Fluids you can use: Redline MT-90, Amsoil MTG

The correct product specified for the AX-15 has changed over the years from
Chrysler so depending on the year of the transmission there are several
options for fluids. According to DaimlerChrysler, the AX-15 should use the Mopar product meeting spec MS9684, part #04897622AA, which is rated as a 75W90 GL-3 lubricant for 1997 and newer AX-15 transmissions. An SAE 75W90 is the same viscosity (fluid thickness) as an SAE 10W40 - see the attached chart. Royal Purple recommends our RP 10W40 API Motor Oil or the XPR 10W40 Racing Oil.
For 1996 and older transmissions Chrysler used to recommend the use of an SAE 75W90 GL-5 gear lube. This would be our RP MaxGear 75W90. You could also use the 10W40 Motor Oil in the older transmissions as well.
I'll probably buy some Redline put that in and call it good then.
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Unread 02-09-2012, 07:25 PM   #10
300zxnovaman
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okay thanks for the help. i should be able to find something now.
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Unread 05-05-2012, 08:57 PM   #11
97CherokeeSport
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So all-in-all, what should I get for my AX15?


Thanks
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Unread 05-06-2012, 08:32 AM   #12
wsar10
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once again.......

http://www.amsoil.com/catalog.aspx?GroupID=213

the redline mentioned over and over in these posts will work as well.

GL-3 rated 75w-90
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


-03 WJ laredo 4.0 120k a few minor mods
-93 XJ 5spd, 3" zone lift
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Unread 05-06-2012, 12:45 PM   #13
97CherokeeSport
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Thank you very much.
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Unread 05-06-2012, 10:10 PM   #14
Textra
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I went with the 75w-90 Royal Purple brand. The stuffs expensive, but I hear good things.
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Unread 05-07-2012, 07:05 AM   #15
wsar10
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Quote:
Originally Posted by Textra View Post
I went with the 75w-90 Royal Purple brand. The stuffs expensive, but I hear good things.
It's over priced......for what it is.
And it's the wrong fluid for the AX-15, this is a GL-5/4.
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


-03 WJ laredo 4.0 120k a few minor mods
-93 XJ 5spd, 3" zone lift
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