99 XJ AX15 fluid type - JeepForum.com

 
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post #1 of 11 Old 03-17-2017, 08:45 PM Thread Starter
CamoX413
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99 XJ AX15 fluid type

Hey guys, I'm usually on the grand Cherokee forum because that's my rig.. My wife however has a 99 xj. I'm changing her manual transmission fluid for the first time and I'm reading confusing information about which fluid type. Can someone please CONFIRM the best and correct fluid type and amount I'll need?

Thank you? I'm sure this is a very common and aggravating subject.

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post #2 of 11 Old 03-17-2017, 09:33 PM
dzywicki
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I is definitely confusing. You are looking for a Gl-4 fluid. At sone point, Jeep switched to recommending 10w30 motor oil, but I have not tried that option yet. There are several options that should be pretty readily available. Stalube makes a Gl-4 gear oil. I got some at my local Napa.Royal purple makes a brass safe gear oil. On the back it will say safe for yellow metal. Redline MT-90 is GL-4 compatible. Amsoil makes a Gl-4 gear oil. I have been interested in trying the Pennzoil synchromesh.
Bottom line, you want a GL-4 75-90 gear oil. Don't put GL-5 in. It will do bad things to the brass synchros. I think some owners manuals were misprinted and indicate GL-5. My owners manual was one of those misprinted ones.
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post #3 of 11 Old 03-17-2017, 11:29 PM
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Pennzoil synchromesh should work wonders. Motor oil wouldn't hurt anything either. Just make sure you don't put in any gl5 fluid because your synchros will be toast

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post #4 of 11 Old 03-18-2017, 07:54 AM
CJ7-Tim
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Synchromesh is the best current choice.


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

The 4.0L (6cyl) 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 AutomaticTransmissions use ATF+3 or ATF+4 Type 7176

Manual Transmission

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

Jeep owners report good results with Synchromesh fluid.


-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)
-NV 3550 5 speed manual - 2.1 quarts Mopar fluid part # 04874464AA or Synchromesh (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 specs (to API Service SL/CJ-4,) NLGI Service specifications are not reverse-compatible.

If you want to use a synthetic (RedLine, AmsOil, etc.) either check the back ofthe 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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post #5 of 11 Old 03-18-2017, 07:58 AM Thread Starter
CamoX413
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Awesome guys thank you. Do you all know by any chance how much I should buy?
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post #6 of 11 Old 03-18-2017, 08:01 AM Thread Starter
CamoX413
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Never mind about the capacity. Didn't see the rest of the last post until just now.

Thanks for all the good info guys!
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post #7 of 11 Old 03-20-2017, 02:21 PM
Tenshots1
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Just to chime in, I put synthetic 10w30 in my AX-15 about 2 months ago. Its shifting great and all seems well.

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post #8 of 11 Old 03-25-2017, 03:44 PM Thread Starter
CamoX413
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Quote:
Originally Posted by Tenshots1 View Post
Just to chime in, I put synthetic 10w30 in my AX-15 about 2 months ago. Its shifting great and all seems well.
Thank you for the input but I went ahead and bought the Synchromesh for now.
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post #9 of 11 Old 03-25-2017, 03:54 PM Thread Starter
CamoX413
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Can someone confirm before I put this in my transmission that it's the right Synchromesh? I didn't see anything on the label about the viscosity.
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post #10 of 11 Old 03-25-2017, 04:01 PM
CJ7-Tim
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The label says manual transmission fluid, and it is Synchromesh, it will be fine.

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post #11 of 11 Old 03-25-2017, 04:03 PM Thread Starter
CamoX413
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Thanks Tim. That's what I figured but it doesn't hurt to double check with someone more experienced than myself.
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