msp problem

So I need an opinion as soon as possible. I've discovered an oil leak between my engine and transmission, and I'm thinking it's my rear main seal going out. I'm not entirely sure though. Any other thoughts of what it might be?

well here it is. i drove the car kinda hard last night for about a two mile stretch on the e-way and stopped at the light at the exit. when it turned green i accelerated and noticed there was no boost at all. the vacuum is sitting at 21-22 and car is running fine aside from no boost. the car is...