Hi Guys,

I'm the owner of a 2010 FX4

I would like to change the Oil in my rear end.

So i've bought Oil (To Ford when i was in Poland) , but on the bottle it's : 75w140 C
Will this oil be Ok for my rear end ? should i add some additive ?

I'm in France and here nobody can help.

I've got to flush the front end too, his there any additive to put in ?

Thanks for your help !

 

Some Ford's used to "require" a friction modifier if you flushed the rear. Why are you flushing? Most of them now are "maintenance-free" that supposedly the fluid is good for the life of the vehicle. I'm not sure I'd completely buy into that theory, but I wouldn't be changing it very often either.

 

I change my rear gear oil every 30k, I do alot of towing. But, if i push it much passed 30k i get rear chatter. If you have a limited slip differential, you will need friction modifier.

 

My truck was water flooded (Just on the exterior).
I've done about 10.000 miles, he got 33000Mi now
and i don't want to break something..

Everything is running smooth atm but if some water was in :x

 

How can i know if that a limited slip ?
My door sticker says : Rear Axle L6

 

I know the L6 is 3.73 Electronic Locking Differential.
As for as how to change the fluid... I googled 2010 f150 fx4 diff fluid change and got many examples of how to do it...
So add a fiction modifier, I find that in my jeeps oil with fiction modifier still needs an additive (friction modifier) to stop the clacks.
correct me if I'm wrong but I think it is better to have more fiction modifier than not enough in a ELD.

g0rilla

 

Yep i guess it's an limited slip see page 4 :
http://www.ford.com/resources/ford/g...vF150sep09.pdf

I will go on Igol manufacture tomorow, i will ask them if they got the Friction Modifier for my rear end

 

You don't need friction modifier on an e locker as there are no friction clutches

 

[QUOTE=CollinM;3166504]You don't need friction modifier on an e locker as there are no friction clutches

Duh, my bad. It was a late post and I wasn't thinking. Must have been all the jeep diffs with ls Quadradrive/quadratraks that polluted my brain.

This is right out of a ford service manual. and it says to don't not use friction mod with ELD.

Material Item Specification Fill Capacity
Additive Friction Modifier XL-3 (US); CXL-3 (Canada) EST-M2C118-A 118 ml (4 oz) to be installed before axle lubricant — Not to be used with Electronic Locking Differentials (ELD) Maximum Strength Retaining Compound
Loctite® 638™ — —
Motorcraft® High Contrast Hypoid Gear Marking Compound
XG-14 — —
Motorcraft® SAE 75W-140 Synthetic Rear Axle Lubricant
XY-75W140-QL (US); CXY-75W140-1L (Canada) WSL-M2C192-A and GL-5 2.84L (6.0 pt) — ELD only
2.60L (5.5 pt) — Non Traction-Lok equipped
2.48L (5.25 pt) — Traction-Lok equipped
Premium Long-Life Grease
XG-1-C or XG-1-K (US); CXG-1-C (Canada) ESA-M1C75-B —
Silicone Gasket and Sealant
TA-30 WSE-M4G323-A4 —
Threadlock and Sealer
TA-25 WSK-M2G351-A5 —

g0rilla

Priceless, you can also call ford toll free and ask them yourself. Better than getting advice from forums.

 

[QUOTE=g0rilla;3166685]So, no Friction modifier ? that's a good news because we can't find it in france lol...

I will try to give them a call but i'm in France and my english is not perfect so sometimes it's a bit hard when people speak a bit fast :x