Another Differential fluid thread

[WannFly]

Ok, so I have read through multiple pages of threads on differential fluid, so much so that I have various jargons pouring out of my ears. Can someone verify this before I do something dumb?

My Jeep: 2021 Rubi 4Xe , little over 9k miles. Upon reading some other threads and watching some YT videos, I would rather change the oil and inspect if everything is kosher inside. While at it, replace the covers with AEV ones. No towing.
Per spec sheet:
Dana M210 Wide Front Axle - believe this is 210 FBI
Dana M220 Wide Rear Axle - believe this is 220 RBI
Tru-Lok Front & Rear Axles
Per owner's manual: Models equipped with Trac-Lok Limited Slip Differential require a friction modifier additive.

I am looking at Amsoil and from what I can tell, below are the correct ones, both contains FM:

On Amsoil website, there are 2 listings of 2.0 L turbo.

Any idea what the differences are? doesn't matter which option I select it seems like the oils are the same.

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[Bleda2002]

Rubi has actual lockers, no friction modifiers required but it won't hurt anything. Personally prefer to go with 75-140 which is the dana recommendation for heavy use, but 75-90 synthetic is fine for normal use.

 

[Rogersocal]

75-140 Royal purple max. Its great stuff and i think many people here on the forums recomend it.

 

[grimmjeeper]

Obligatory...

 

[grimmjeeper]

On Amsoil website, there are 2 listings of 2.0 L turbo.

Any idea what the differences are? doesn't matter which option I select it seems like the oils are the same.

The 4XE has a 2.0 gas engine. I bet the number in brackets is the VIN code for whether it's a standard 2.0 or 4XE 2.0 with electric motor. The 392, 3.0 diesel and 3.6 engines will have a different code.

But regardless of the engine, the axles are pretty much the same. There is little to no difference between them as far as oil needs go.

Spec is for 75w90, Dana recommends 75w140. You can use friction modifier in any stock axles. You need it if you have the limited slip.

If you install a TrueTrac, they recommend not using friction modifier since it affects the torque bias. But that's the nature of helical gear limited slip.

 

[WannFly]

Thanks everyone. much appreciated

 

[WannFly]

After reading like 50 pages on this, I decided to order the 140 for both and valvoline flexfill

https://www.jlwranglerforums.com/forum/threads/differential-oil-change.47318/post-2057697 - DANA recommendations

Thanks to @Rhinebeck01 and @CarbonSteel and many others who commented on the other thread.

 

[azwjowner]

After reading like 50 pages on this, I decided to order the 140 for both and valvoline flexfill

https://www.jlwranglerforums.com/forum/threads/differential-oil-change.47318/post-2057697 - DANA recommendations

Thanks to @Rhinebeck01 and @CarbonSteel and many others who commented on the other thread.

But after 50 pages you missed the most important thing (to me): Valvoline is now owned by Saudi Arabia. Should have gotten the AMSOIL pouches insetad.

 

[Rhinebeck01]

After reading like 50 pages on this, I decided to order the 140 for both and valvoline flexfill

https://www.jlwranglerforums.com/forum/threads/differential-oil-change.47318/post-2057697 - DANA recommendations

Thanks to @Rhinebeck01 and @CarbonSteel and many others who commented on the other thread.

Better off reading through "like 50 pages" and after finished reading...as a end result, you have a real clue in regard to the diff fluid dance you will be doing with your JL.

Yes, do go with Valvoline FlexFill 75/140 in both frt and rear.

As for who owns Valvoline.... who the fruck cares.. I know I would never ever buy Amsoil.
And no, I will not get into a back and forth with anyone here in regard to Saudi Arabia, etc...

.

 

[grimmjeeper]

 

[CarbonSteel]

But after 50 pages you missed the most important thing (to me): Valvoline is now owned by Saudi Arabia. Should have gotten the AMSOIL pouches insetad.

Any 75W-140 gear oil that meets API specification GL-5 will work. While I am not a fan of other Amsoil products their gear oil is some of, if not the best, on the market.

With that said--ANY OF THESE will be totally fine and far exceed what comes in the axle from the factory:

Mobil 1
Castrol
Valvoline
Pennzoil
Royal Purple
Lucas
Motorcraft
Shell
Chevron
Red Line
Motul
Total
SuperTech
Warren
FRAM
Mopar
LiquiMoly
Ravenol
Conoco
Phillips 66
Schaeffer's

 

[azwjowner]

Any 75W-140 gear oil that meets API specification GL-5 will work. While I am not a fan of other Amsoil products their gear oil is some of, if not the best, on the market.

With that said--ANY OF THESE will be totally fine and far exceed what comes in the axle from the factory:

Mobil 1
Castrol
Valvoline
Pennzoil
Royal Purple
Lucas
Motorcraft
Shell
Chevron
Red Line
Motul
Total
SuperTech
Warren
FRAM
Mopar
LiquiMoly
Ravenol
Conoco
Phillips 66
Schaeffer's

Only reason I mentioned Amsoil was the pouches seemed to be important to the OP. I have no Amsoil fetish.

 

[WannFly]

@CarbonSteel _ any recommendation on T-Case fluid? I can always use the Mopar one, but wondering if all ATF-4 are pretty much the same?

Amazon.com: Valvoline (VV346-6PK ATF+4 Automatic Transmission Fluid - 1 Quart, (Case of 6) : Automotive

Since I will be crawling under the Jeep, might as well change this one too

 

[Rhinebeck01]

@CarbonSteel _ any recommendation on T-Case fluid? I can always use the Mopar one, but wondering if all ATF-4 are pretty much the same?

Amazon.com: Valvoline (VV346-6PK ATF+4 Automatic Transmission Fluid - 1 Quart, (Case of 6) : Automotive

Since I will be crawling under the Jeep, might as well change this one too

@WannFly

In regard to my comment about Amsoil and my not buying it... Amsoil gear oil is very good and they have the flex bag but it is pricey, so I will not buy it..

As for your Transfer case....

Valvoline Synthetic ATF+4 is what I use.... but..

You can also use Mopar ATF+4 Transmission Fluid. PN 68218057AC

Of course, there are other brands of ATF+4

Always be sure you can loosen the fill plug before you remove the drain plug.

You will need a hand pump to get the fluid in with. This is a decent inexpensive pump. I use it with a clean, empty, plastic, qt. Snapple bottle..
https://www.amazon.com/gp/product/B07DTS8N7P/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Use yellow Teflon tape on the fill and drain plug.

Do know that you have a skid plate that will be in the way when you go to drain the transfer case...
Some guys/gals will pull the skid plate,(and chance breaking a skid plate bolt(s)) but it is far easier, to fashion something like below to facilitate draining..

You place this between the drain hole and the skid plate.... you pull the plug and the fluid runs along it, and then into the drain pan. No big mess on the skid plate and no pulling the skid plate.

This is an aluminum foil pan you get at the dollar store, etc.. You just cut the shape and fold up the edges. It's about say 16" long and about 4-5 inches wide. Easily cleaned when you get done so you have for next time..

 

[WannFly]

Thank you @Rhinebeck01 . much appreciated.

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