reed857

hey guys I have a ls tranny that whines really bad when accelerating in fith gear. it sounds like a metal whine but I am unsure.does not make noise when not accelerating in 5th or in any other gear. I changed my tranny fluid to make it was fresh and not low. any sugestions would be of much help. also if any one knows about a guy or company that builds hybrid trannys let me know. thanks Jon