Differential fluid change - do I need friction modifier?

[Aramco Raptor]

Apparently not...I'll look for it now...

 

[Aramco Raptor]

Yukon,

I just did multiple searches and went through 20 pages of threads...

Is there a particular thread you are referring to?

 

[Yukon Joe]

Bump for my buddy

Yukon Joe

 

[Yukon Joe]

I bumped it for yeah.

http://www.fordraptorforum.com/showthread.php?p=619203

I run the amsoil with afe rear diff cover that I got from @Chris@FreedomMotorsports.

No issues in over 30k miles

Yukon Joe

 

[Aramco Raptor]

Thanks Yukon.

As for the friction modifier conundrum...from the SVT Supplement...Page 32

 

[Dv8tor]

So I just ordered a case of 75W140 for my diffs. But then I was just glancing at SDHQs website and they have bottles of 75W90 for the front diff. I ordered 2 tubes of that slip lock stuff too. Should I order 75W90 for the front or will the 75W140 work?.

 

[Jimbo]

Use 75W90 for the front, per the specifications.

 

[Hazzard]

I have used both Royal Purple, & Amsoil both have been great.

 

[Jimbo]

I'm using Redline... but any of the brands you listed are all good quality.

 

[HAYNES OFFROAD]

Redline, Lucas, royal purple, amsoil.... All great lubes, and can't really go wrong with any of them

Personally I use Amsoil in all my vehicles, bikes, etc... Have been using it exclusively for 15 years. I test all my fluids and brands, and ive always got the best results with amsoil. This includes testing customer fluids when I change any out.

Ive become on a first name basis with blackstone hahaha