changing rear differential fluid
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
I got to do the same, change out the rear more so now, i,m getting some new sneakers for my ride and i did a burnout and one wheel only spinned(right rear). I guess its time for me also to change out the diff-fluid.? Sorry for the hijack.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Change the fluid then taker her for a test drive. If she chatters or gives you issues you can add a couple of oz at a time of the friction modifier. Some synthetic fluids do not require the friction modifier but occassionally they need it also (like 1 in 200). If you think you are having issues you can send in an oil analysis of the fluid.
Mike, if we hook up in June I will grab a sample of your rear diff and send it into the lab to see how she is holding up.
Mike, if we hook up in June I will grab a sample of your rear diff and send it into the lab to see how she is holding up.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Not sure what you are waiting for that has not been said. If the diff is fine, then consider it PM. If it isn't it may help. I will say that my fluid was pretty crappy looking but exhibited no symptoms. Just remember the diff is like the tranny with slipping clutches etc that give off residue that was suspended in my old fluid. Having said that, you could run the stock unit to well over 500k and not have a problem. Up to you.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
If you like Rich. Look forward to meeting you this time.
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Posting Guru
Joined: Oct 2007
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From: Bloomfield Hills, MI
I changed mine About 10K after i got the truck. used 5 bottles of mobil 75W1?? (i think 140) full synthetic. Also sanded the pan down and brake cleaned the hell outta it. Put about 12 layers of high heat paint with one layer of a tough enamel on the outside. Used black with orange high heat RTV. Looks pretty cool. get alot of comments on the oozing orange RTV lol So far- so good. I didnt use any friction modifier per the guy at ford looked up VIN and said i dont need any. (no locker or somthing?)
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Who cares? You know how I feel about OAs anyway. I'm not going to start the hand wringing regardless. When it quits, I will fix it.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Just looking for an excuse to drop by & have a few
..SOrry to
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