mine popped on Keith, which sucked because he had to take the entire turbo+tranny apart again, and install a new one. . .and the "old one" was actually new from Spec, no one really knows. . . .I run ATE Super Blue as well, wondering if I should switch. . .don't know how that could do it though since the slave cylinder popped within the turn of a key. . . .go figure. . .