Trans whines at 5300rpm+...what causes that?

[5spd GT]

I know there is probably a simple answer like "your trans is on it's way out"...but what causes it to drive fine and then when I go WOT the trans whines and it appears there is almost a slight vibration in it at those rpms...

It did this without the h/c/i with just bolt-ons, full exhaust, and 373's...and does the same with the stuff in the sig...

But like I said the trans shifts fine and I drive everyday without a problem...a slight whining in 3rd gear but it appears to be almost normal...it has did that since I've had it...

It is a 95 t-5 with about 100,000 miles on it...probably more...

Any ideas?

 

[88stangmangt]

well all i can think of is check the fluid level ....but at 5300+ is awefully fast for the trans so i wouldnt be surprised if it didnt make any noise.

 

[jpctln]

My 3rd gear starts whining at 2500 RMP+ and gets louder and louder if I floor it. I've never brought it to over 5k, but it vibrates pretty hard up there. No other gears do that though. It's got a fresh load of Dextron too.