Differential fluid change - do I need friction modifier?

[Nick@Apollo-Optics]

I saw that, but the Raptor supplement shows something different than the main F-150 manual. If it's better protection for offroading, why did they spec it differently? Typo?

http://www.fordservicecontent.com/Ford_Content/Catalog/owner_information/2014-F-150-SVT-Raptor-Supplement-First-Print_rp_en-us_09_2013.pdf

Did we ever get an answer on this?

 

[Madcowranch]

Couldn't find any without FM so I just went with Royal Purple.

 

[Nick@Apollo-Optics]

Couldn't find any without FM so I just went with Royal Purple.

Not the FM. I was quoting the post of the owner's manual that called for a different weight diff fluid (75W-85 instead of 75W-140).

 

[Madcowranch]

Sorry for the confusion Nick, I was responding to one-eyed Joe.

 

[Ruger]

Damn. I thought I had this well understood, and then SOMEBODY muddied up the water. Again.

 

[Red]

Just take it to the dealer and let them do it. problem solved,

 

[Humvee21]

Just take it to the dealer and let them do it. problem solved,

And let them put that **** oil in it? No thanks.

 

[Ruger]

Just take it to the dealer and let them do it. problem solved,

Owner: "I'd like you to change out the gear oil in my Raptor's differential.

Dealer: "That will involve removal of the differential cover."

Owner: "Yeah, I know. Stupid design, huh?"

Dealer: "It'll take all day."

Owner: "I'll wait."

Dealer: "Do you know if your vehicle requires a friction modifier?"

Owner: "You're supposed to know that."

Dealer: "Oh. Yeah. Um, how many miles on your truck?"

Owner: "50 thousand."

Dealer: "Oh, the differential fluid in your truck is good for the life of the truck. Good news! You won't have to wait. Have a nice day."

 

[155mm]

Damn. I thought I had this well understood, and then SOMEBODY muddied up the water. Again.

LOL sorry dude...

 

[Humvee21]

Owner: "I'd like you to change out the gear oil in my Raptor's differential.

Dealer: "That will involve removal of the differential cover."

Owner: "Yeah, I know. Stupid design, huh?"

Dealer: "It'll take all day."

Owner: "I'll wait."

Dealer: "Do you know if your vehicle requires a friction modifier?"

Owner: "You're supposed to know that."

Dealer: "Oh. Yeah. Um, how many miles on your truck?"

Owner: "50 thousand."

Dealer: "Oh, the differential fluid in your truck is good for the life of the truck. Good news! You won't have to wait. Have a nice day."

Don't forget about them charging you for it for "diagnostics".