Once more and again
From the experienced old guy: I have had, in the past, issues with Girling seals turning into some form of soft flubber when "silly clone" is added. But not lately! The issue is the chemistry being non-compatible; make sure all the old stuff is gone, gone, flushed. My feeling is also that the newer seals are a bit harder compound and although they drag a bit in the control valve function, manage to swim well in the fake stuff. Still, after having done more than 300 of the little Girlings in 4 decades, it's a mystery when they work!! keepin' em' runnin' randy w