So i own a 1996 mustang gt and ive recently noticed a squeaking coming from somewhere in the engine..but only at certain times..i think its coming from the transmission

it only happens when i push the car... Most of the time when i floor it or accelerate rapidly

i think it happens when the car changes gears but ive also noticed it when i stopped accelerating.
You can hear it in this video around 9 seconds

http://www.youtube.com/watch?v=oHVZO3emCzo

I left the car in first gear for the video so im not sure if its the transmission

Anyone know what it could be?

 

I don't hear anything.. is it a short squeak or a longer squeal?

 

its short and hard to hear..thats why i tried to provide other info apart from the video