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  #13  
Old 12-04-2016, 06:27 PM
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Re: Gear oil question

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Originally Posted by Governor View Post
So is the friction modifier in there or not needed at all? My 2011 manual only uses the term once - Mopar Synthetic Gear and Axle Lubricant or equivalent with friction modifier additive. This is describing the 3.6 (which was not even available in ELSD). The 5.7 calls for the Mopar oil without a reference to the additive, so I'm assuming you are absolutely correct unless I see something different. This is new info for me, I had never heard this before. Thanks for the hook up.
No, Mopar 05136035AA does not have fm in it. It is the proper (Mopar) diff fluid for both your 2011 diffs since your rear is non-elsd and while it would not hurt a non-elsd it would be a serious waste of money. The elsd was only standard on the Overland+ I believe so that is why 5.7 is not a clear line in the sand for elsd rear diff.



a little more on previous discussion to clarify a few things...

wk2jeeps is an awesome resource and definitely a virtual bible...it is no more wrong or misleading than the owners manual, just as you are very correct to question me or anything you read on the internet one should use all resources available to arrive at an actual decision/action as it relates to your vehicle. I personally ref my manual first then go to wk2jeeps for the details/descriptions to include part numbers and really good info all around. We would all be lost without the wk2jeeps resource. The wk2jeeps caution on using the gear oil with fm is more aligned with it's anchoring on the manual (which it should) recommendation of using Mopar fluid which the front diff fluid 05136035AA does not have the fm and since it is not as "exotic" as I call it will likely create chatter if used in the rear elsd. I am pretty sure folks who are stuck on mopar only will buy the mopar fm separate so they can buy the 05136035AA fluid for both since it's cheaper and the qtys each diff require bone you on the amount you buy of the other one with the fm in it. So they just add the separate mopar fm to the rear diff when they put in 05136035AA (normally front diff only)...hope I did not talk in circles there ..

I am not advocating Amsoil, just happens to be what I use, nor anti-Mopar nor not doing what the manual "recommends" as one is certainly totally safe strictly following the owners manual. There are always areas of "controversy" or less-defined details. The true need for friction modifiers in an elsd is one of them. Gear oils are as different as the range of elsd's they lube. Amsoil even states it cannot guarantee no chatter that's why they offer the anti-slip additive just in case. I am just an Amsoil fanboy because it is so over-engineered and tested I really value the huge margin of safety their snake oils provide. Many, many other fine snake oils out there. Royal Purple, etc...Pretty hard to go wrong with anything so long as it is the proper spec (API GL-5 in the case of the diff gear oil) and it is properly inspected/changed...I don't trust things that I can't see so I also test all oil that comes out and then do trending samples...just an oil geek I guess.

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  #14  
Old 12-07-2016, 12:25 AM
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Re: Gear oil question

Quote:
Originally Posted by GoPlzGo View Post
No, Mopar 05136035AA does not have fm in it. It is the proper (Mopar) diff fluid for both your 2011 diffs since your rear is non-elsd and while it would not hurt a non-elsd it would be a serious waste of money. The elsd was only standard on the Overland+ I believe so that is why 5.7 is not a clear line in the sand for elsd rear diff.







a little more on previous discussion to clarify a few things...



wk2jeeps is an awesome resource and definitely a virtual bible...it is no more wrong or misleading than the owners manual, just as you are very correct to question me or anything you read on the internet one should use all resources available to arrive at an actual decision/action as it relates to your vehicle. I personally ref my manual first then go to wk2jeeps for the details/descriptions to include part numbers and really good info all around. We would all be lost without the wk2jeeps resource. The wk2jeeps caution on using the gear oil with fm is more aligned with it's anchoring on the manual (which it should) recommendation of using Mopar fluid which the front diff fluid 05136035AA does not have the fm and since it is not as "exotic" as I call it will likely create chatter if used in the rear elsd. I am pretty sure folks who are stuck on mopar only will buy the mopar fm separate so they can buy the 05136035AA fluid for both since it's cheaper and the qtys each diff require bone you on the amount you buy of the other one with the fm in it. So they just add the separate mopar fm to the rear diff when they put in 05136035AA (normally front diff only)...hope I did not talk in circles there ..



I am not advocating Amsoil, just happens to be what I use, nor anti-Mopar nor not doing what the manual "recommends" as one is certainly totally safe strictly following the owners manual. There are always areas of "controversy" or less-defined details. The true need for friction modifiers in an elsd is one of them. Gear oils are as different as the range of elsd's they lube. Amsoil even states it cannot guarantee no chatter that's why they offer the anti-slip additive just in case. I am just an Amsoil fanboy because it is so over-engineered and tested I really value the huge margin of safety their snake oils provide. Many, many other fine snake oils out there. Royal Purple, etc...Pretty hard to go wrong with anything so long as it is the proper spec (API GL-5 in the case of the diff gear oil) and it is properly inspected/changed...I don't trust things that I can't see so I also test all oil that comes out and then do trending samples...just an oil geek I guess.


Just picked up 3qts of AMSOIL Severe Gear 75w-90 and some MOPAR Friction Modifier for the rear. Going to do both differentials tomorrow and also the transfer case.

Anyone have a link for DIY instructions or videos for either of those? Thanks guys.
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  #15  
Old 12-07-2016, 12:38 AM
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Re: Gear oil question

I just saw a thread somewhere on here yesterday with pictures doing front, rear and transfer case. Should be near the top since someone had just responded. Basically you'll see the drain plug and a fill plug.
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Old 12-07-2016, 02:26 AM
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Re: Gear oil question

Okay I'll look for it. Thanks bud
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  #17  
Old 12-07-2016, 06:52 AM
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Re: Gear oil question

here is front/rear diffs...

DIY- 2011 Differential Service/ Fluid Change

this is a good short read too...

Changed diff oil again, 24k on it.

this is the TC...

Transfer Case Walk-through?

also, don't use the Mopar FM, it is not recommended with the Amsoil gear oil, if chatter use the Amsoil anti-slip, same price anyway...you won't need it, trust me...

have fun...let me know how much ATF you get in the transfer case, mine took way more than any spec in print and I followed additional advice from a jeep tech on here for true leveling since the TC is not vertically straight..."spec" ranges from 1.4qt to 2.2qt for my actual....here is my post on that one...I often over think things so pick your qty but "til it comes out" is just that...fwiw, the TC refill vol is known to be variable, which drives me and my sense of order nutz.....MP3010 Transfer Case Fluid Capacity Confusion
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