Differential fluid change - do I need friction modifier?

[Madcowranch]

lol. You guys are going to find that all the 75-140's already have it added.

This thread is getting comical.

 

[FordService]

We'll see what Crystal the Ford Rep comes up with....

Still waiting on a response from my contact, Ruger; I'll keep bugging him until I get an answer.

Crystal

 

[Ruger]

lol. You guys are going to find that all the 75-140's already have it added. This thread is getting comical.

Aw MCR, you're just being nice. Actually, this thread is thorough. The question isn't the friction modifier any more, because thanks to the group we've resolved it. The question is now whether to use 75W-140 or 75W-85. Me thinks maybe you don't want to contemplate replacing your gear oil with the right stuff! (hee-hee!)

We'll know soon because Crystal is on the job!

 

[Madcowranch]

I thought they changed the diffs in 2012 to gave one more tooth in the gear set? Isfast discussed it in a thread some where.

Yukon Joe
GREAT LAKES RAPTOR EXCURSIONS

'11 and up. Larger pinion shaft/bearing.

 

[Ruger]

That's not it then, because both the '10s and '11s specify 75W-140.

 

[Cleave]

2013+ model year raptors do not have the same rear differentials as the 2010-2012 model year raptors, wiz covered this (I believe in his build thread, not exactly sure where it is though), the 2013+ has larger axle shafts with more splines engaging the axle shafts to the spider gears in the differential

---------- Post added at 08:02 PM ---------- Previous post was at 07:34 PM ----------

Link to the post where wiz covers the updated diff http://www.fordraptorforum.com/f65/wizs-build-24330/index12.html#post595267

 

[Madcowranch]

'11 and up. Larger pinion shaft/bearing.

Sorry I meant they changed in 2012.

 

[Yukon Joe]

^ 12 > 10 !!!!!

Yukon Joe
www.RUNRAPTORRUN.com

 

[Madcowranch]

^ 12 > 10 !!!!!

Yukon Joe
GREAT LAKES RAPTOR EXCURSIONS

 

[COBRA90GT]

I'd just like to say that old/used gear oil is stinky! LOL