Differential fluid change - do I need friction modifier?

[NickPic83]

Thanks for keeping us updated

Sent from my XT1080 using Tapatalk

 

[Humvee21]

I received a reply from Blackstone Labs.

Here was my question to them:

I need an analysis of the rear differential oil in my 2014 Ford F150 truck.
It's to determine the oil viscosity that came from Ford Motor company and
if it has any type of a "Friction Modifier" in it.
Can you help determine this for me?
I put "industrial" for the type of kit that I need.
But I'm not sure if it would be the correct kit.
Thanks.

Reply from Blackstone Labs:

Thanks for the e-mail. Yes, we can help you with this.
Friction modifier shows up as phosphorus in our testing and the viscosity is
included in our standard analysis.
A kit is on it's way to you.

My kit is on it's way.
Getting a report on the UOA may be quicker than I anticipated.
I'll continue to update everyone as this moves along.

What are you putting in it when you drain it and send out the sample?

 

[R1jamn]

I don't plan on taking the cover off right away.
I'll pump out 3 oz. of rear diff oil from the fill hole and send that sample in.

The plan right now is to install my Mag-Hytec cover and fill with Amsoil Severe Gear 75w-140 after I get the UOA report.

 

[Humvee21]

Good idea. I think I may send mine in as well. I'd be interested in sending mine since it's a 2012

 

[pat'sRAPTOR]

doing this on your engine oil is also a really good idea. i have a kit laying around some where but haven't used it yet

 

[BramageDained]

What are you putting in it when you drain it and send out the sample?

This is what blackstone sends out to you:



You can get the kits for free, it costs you money once you send it to them.

 

[R1jamn]

The Blackstone Lab UOA sample kit arrived this weekend.
Today I pulled a sample from the rear differential using a transfer pump.
I will mail out the sample tomorrow (Monday).

Fill Hole.


This works great for holding the container while pulling a sample.


Tighten the lid


Boxed up and ready to mail out tomorrow.


The fill plug has a magnet. You can see the sludge collecting on it. This is after 2,346 miles on my '14 Raptor.


Clean it up and reinstall at 22 lb-ft

 

[Wilson]

The orange reddish stuff is lock tight? Did you put some on?

 

[R1jamn]

^^^

No it's not a thread locker. Do not apply any type of thread locker on these threads.

The red you see on the fill plug is a thread sealant. This was applied at the factory.
The thread sealant should be cleaned off and reapplied with fresh product.
I will reapply thread sealant after I am done changing out the diff cover and refilling with fresh gear oil.

Permatex High Temp Thread Sealant (part #59214) is a good product. You can easily find it at your local auto parts store.
it is made to seal tapered metal pipe threads like the fill plug.

You may also use Loctite 565. This is also a thread sealer made to seal tapered metal pipe threads.

 

[R1jamn]

Blackstone UOA Report

I just received the Blackstone UOA report on the rear differential oil.

The Blackstone sample kit includes a sheet that will ask specific questions about vehicle and oil.
It also has a comment section. So I specifically asked Blackstone Labs.....

1.) I need to know if this is synthetic oil.
2.) I need to know the viscosity.
3.) I need to know if this oil has a friction modifier added.

Blackstone Labs cannot test base stock oils and cannot determine 100% if it is synthetic oil. But it does appear to be synthetic.
It appears the rear differential oil is 75w-140.
It appears to have some type of a friction modifier.

I will now proceed with changing out the stock differential cover with a Mag-Hytec cover and change the fluid to Amsoil Severe Gear 75w-140 synthetic oil.

Here is UOA Report.