differential fluid
Lead Driver
Joined: Dec 2013
Posts: 9,762
Likes: 115
After the first change, you can make the oil last almost forever by gluing a rare earth magnet on the bottom area but out of the way.
The magnets are about the size of a dime only thicker and they are STRONG. This will catch all the fine metal from wear, oil will look new a 100k later
The magnets are about the size of a dime only thicker and they are STRONG. This will catch all the fine metal from wear, oil will look new a 100k later
And if you have a bad and old hard drive that spins, they have a couple of rare earth magnets in them. I have one out of a laptop spinning drive on my fridge. (The SSDs won't have them). It is amazing how strong they are, I put it on the fridge and you have to peel it off the edge to remove it and it has a lip on it so you actually can grab it.
One of the things I didn't like about my 2011 with the plastic oil pan and plug was that there was no place to put a magnet - at least for it to work. Also one of the things I don't like about a fumoto - no magnet at the end of the drain plug either.
I usually change over to synthetic diff fluids around 10k miles and find small metal specks in the oil. Then I never mess with it. Usually because I haven't kept a vehicle to over 100k miles in a long time. Never changed tran fluid - especially in these trucks always seems to look perfect. I hate Honda for that - one at 7.5k and then every 15k you are doing a trans flush/fill on their AWD vehicles.
Cargo Master
Joined: May 2012
Posts: 2,616
Likes: 1,190
From: Door Cty/Florida
I don't read much here around changing transfer case, diff, or transmission fluids. Started wondering if it was because the 6.7l is only since 2011 or if FTE members typically don't change them. Is changing these fluids an old habit for some that they continue to do even though fluid quality has improved over the years and this is not necessary with modern fluids. I've not kept my last two trucks long enough to change these fluids, it's just something I was thinking about. I also think owners of 6.7L trucks tend to fluids better than your average car owners. I don't know one person in my circle that changes their own oil, yet many here still crawl under their trucks for oil and fuel filters all the time.
Post Fiend
Joined: Jan 2009
Posts: 6,521
Likes: 11
From: Greenwood, SC
Well, I can tell you this. I've never considered messing with the rear diff on my trucks but after reading your question and the mag hytech thread it's got me thinking it would be fun to do. Just for fun though, lol. I still think it would be impossible for the diff and trans to overheat and damage themselves being used in a typical/responsible manner.
Logistics Pro
Joined: Jan 2013
Posts: 3,778
Likes: 153
Well, I can tell you this. I've never considered messing with the rear diff on my trucks but after reading your question and the mag hytech thread it's got me thinking it would be fun to do. Just for fun though, lol. I still think it would be impossible for the diff and trans to overheat and damage themselves being used in a typical/responsible manner.
In most axle setups there is room for more oil than the fill plug allows. Those that run lifted rigs have a tendency to have short lived axle sets due to high pinion angles and since the pinion bearing gets its oil from 'splash' the high angle starves it.
But Wait...there is a solution, go buy a 1" brass street elbow (NOT 1" in diameter but length) and install it on your axle, use it to fill with and you give it enough oil to keep from starving and keep it cool to boot and not have to spend hundreds on a new cover....
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
You are correct!
In most axle setups there is room for more oil than the fill plug allows. Those that run lifted rigs have a tendency to have short lived axle sets due to high pinion angles and since the pinion bearing gets its oil from 'splash' the high angle starves it.
But Wait...there is a solution, go buy a 1" brass street elbow (NOT 1" in diameter but length) and install it on your axle, use it to fill with and you give it enough oil to keep from starving and keep it cool to boot and not have to spend hundreds on a new cover....
In most axle setups there is room for more oil than the fill plug allows. Those that run lifted rigs have a tendency to have short lived axle sets due to high pinion angles and since the pinion bearing gets its oil from 'splash' the high angle starves it.
But Wait...there is a solution, go buy a 1" brass street elbow (NOT 1" in diameter but length) and install it on your axle, use it to fill with and you give it enough oil to keep from starving and keep it cool to boot and not have to spend hundreds on a new cover....
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ac700wildcat
1987 - 1996 F150 & Larger F-Series Trucks
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Aug 6, 2007 11:42 PM
