what weight gear oil in axles?

[Ben824]

I need to know what the proper weight gear oil is that goes in the axles in my XJ and how much goes in each diff? It is a 97 4.0L auto 4x4 on 33s with stock axles D30 front and Chrysler 8.25 rear with trac loc (I know I need the additive if the oil doesn't already have it mixed in). I am taking the XJ on spring break so she needs to be ready to make a nearly 7 hour road trip. I have changed the oil out before but I just can't remember off the top of my head what weight and how much is needed for each axle. Thanks in advance for the help.

 

[Ghost]

I use 90 wt. Not sure on amount as I have bigger axles now and don't remember how many I used in the past.

 

[dave92cherokee]

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
-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 specs (to API Service SL/CJ-4,) NLGI Service specifications are not reverse-compatible. Well-stocked parts houses will have both NLGI GL-3 and NLGI GL-5 mineral-based gear oil in stock all the time.

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

 

[Cnickgo]

I use Lucas 75w140. Like in daves post at the bottom, the 75w140 is recommended is you wheel or tow.

 

[Camel013]

I went with lucas on my first change front and rear (also put larger cap. diff cover on), and I got two mpg increase in 2wd:clap:. I'm guessing the old stuff was really old from before I bought it.

 

[dave92cherokee]

A question about this but the OP mentioned diff fluid that already has the friction modifier in it. Does anyone know what brand this is as I need to drain, clean, and refill the 44 on the manche.

 

[Ben824]

I know for a fact that the royal purple already has the friction modifier in it since I finally got around to changing the fluids. I believe lucus oil has it already in it but don't quote me on that one.

 

[DrRandy]

i use Valvoline 85W-140, i think the last fill up was the high dollar synthetic blend!!

 

[4x4JeePmaNthINg]

Is there any issue with using full synthetic in the hp d30

 

[themauler]

Is there any issue with using full synthetic in the hp d30

No issues. Did it once because I thought the word synthetic sounded cool but you might as well just use regular oil because there will be water and dirt in the axle before you need to change out synthetic fluid. My 0.02