I have an occasional leaking automatic transmission on my 1993 100CSQW. Just recently changed fluid to Amsoil synthetic. Is it possible I may have overfilled? Is there a way to check proper level or pressure? Do I have to go to a dealer to check this out? Any information greatly appreciated. Dave Torrey 1993 100CSQW (55K miles) 1987 Saab 900S (150K miles) 1979 BMW 320I (100K miles)