If you have the talent and time to rebuild your trans for $300, that puts you in a different camp than many of us. It would be a great hardship for me to even pull my trans out. (Side note: I blew up a 904 of mine after installing a simple shift kit in high school and have been intimidated by auto trans ever since.) My concerns about ATF type are greater for FWD trannys than for truck trannys... my perception is that the FWD is less tolerant.

My first post came across that incorrect fluid causes sudden and certain failure, and that does not happen every time as a couple of you have shown. To quote Dirty Harry "you've got to ask yourself punk, Do you feel Lucky??"