the one holding it to the driveshaft its a spring one into the gearbox i believe. i no i had to crack out my circlip pliers when i changed my front cv boot
easy to remove hub nut off ball joint off pull out of hub ( if not siezed into the hub like mine) remove cv clip pull rubberboot back remove circlip knock cv joint off replace with new.
hey give this a try will tell you whats at fault hopefully http://www.toyotagtturbo.com/forums/showwiki.php?title=EFI+self-diagnosis+system cheers nick