I don't know if there is any truth to it or not , but I was also told one time that it was bad for a automatic trans to be put in neutral at high speed , something about it turning at high rpms but the pump not because engine is off or idleing , like I said , mayby some trans guys might know more on this,,,,Paul
found this thread on the subject
http://forums.racingjunk.com/viewtopic.php?t=10286