Worked on my wife's 2017 Ford Explorer today... 76K miles
Last year I attempted to change the rear differential fluid but just couldn't manage to get the fill plug out... Doesn't have a drain plug...
It does have a vent on top of the casting, but decided not to try and fill it through that fitting...
The drain plug gave up and I was able to remove the plug using the anvil on a 3/8" ratchet...
I used my HF vacuum sucker that runs off my compressor... Worked great...
The drain plug has a magnet but the end that should have been wet was dry...
Manual says it takes 1 liter to fill and about 1/2 liter came out... Probably 7/8 liter of fluid went back in...
Strange thing... No sign of leakage anywhere around the differential... Is FORD skimping on the factory fill??? IDK
I fished the suction hose down and around inside the case while the HF Holt fluid Extractor did its thing... This tool made the job easy...
After filling until some fluid just started to drip out of the hole, the plug got a coating of Permatex high temp thread sealant...
FINI...

I'm curious about the low fluid level...