Diff oil change
Before completing the fuel tank fitting I decide to give the diff/final drive an oil change. There is no drain plug (as Ford didn't believe it needed changing before the Sierra body rusted away and the car was scrapped). I didn't fancy disturbing the rear cover's seal so I used a syringe and short length of plastic windscreen washer hose to remove the old oil. There was very little swarf on the magnetic filler plug suggesting all is well. The old oil wasn't in bad shape and not black as I expected. It was more the colour of a good brown ale whereas the new stuff is a nice amber colour.