Transmissions failed before the fluid wore out? Any scientific evidence to prove that the fluid in these failed transmissions was up to spec? Or is this just another guess? If not broken down fluid or contaminants, what exactly caused the failure? Go ahead, make more guesses.

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Current Bimmer
2004 X5 4.4i Sterling Grey Sport/Premium

Past Bimmers
1991 318I Alpine White
1995 740I Alpine White
1991 525I Schwartz
1998 323IS Scwartz
2004 330CI Cabrio Titanium Silver Metallic
1995 540I Schwartz
2000 Z4 3.0 Titanium Silver
2000 330ci Coupe Titanium Silver