carguy75

Well today I finished the rear differential fluid swap.
 
Next time I will just suck out the old RP fluid and fill it with new fluid without removing the diff cover.
 
I will not be messing with it until maybe 60k miles since the rear axle does not get hardly any power from the PTU.
 
Next will be a PTU fluid change, but I will have to do that one every 30k miles to be sure since i heard some bad rumors about the PTU life expectancy when going too long on old fluid.
 
It looked like my rear differential was over-filled some how, but I am not surprised since I have read that other Ford owners have had the same thing happen to their cars from the factory.
 
http://www.allfordmustangs.com/forums/2011-2014-mustang-gt-tech/263401-rear-differential-overfilled-leaking-breather.html

The leak turned out to be from a leaking o-ring in a transmission cooler hose.
 
The Ford service department replaced the hose as well as the transmission cooler unit due to it having a leak as well, so problem solved.
 
It turned out to be a $1500 dollar job, so thank you zero deductable extended warranty.
 
My advice would be for anyone looking at a used 2011 Ford Edge would be to place a newpaper or cardboard under the car you test drive near the radiator/front bumper and let it sit there while you talk to the salesperson and look for an drips, because these leaks can be very small and hard to spot until it is too late.
 
Back to lurk mode.