2010 PTU Fluid Change

[DeanT2010]

Our 2010 awd limited with 217000km has never had its ptu fluid changed.  Local ford says its for life dont worry.  Everyone else seems to disagree.  I put my big boy pants on and tackled it.  Initially drove the front on ramps.  Crawled under and opened the filler plug.  About 100ml or so fluid ran out.  Oddly it seemed decent,  brown not black but smelly.  Using a suction tool managed to get about 150ml or so out.  Rooted the hose around as best as possible but didnt get much more out.  Then jacked the rear up on stands to be level by the eyeball measurement technique. I pushed the fluid in slowly to let it run down internally.  Kept filling until it puked out on hose removal.  I let it drizzle until it just dripped and replaced the cap. Figure i got about 280 to 300ml back into the PTU. The other 300ml ended up on the floor, my hair and every other place I dont want it.  Used 75w140 Pennzoil synthetic.  Based on others experience did I meaningfully extend Edgeward’s life or tragically cut it short?