I am trying to figure out what my problem is with my 94 v6 4runner. there is the plastic air tube that comes off the butterfly valve on the intake, it Y's and the upper part goes to the air cleaner box and the lower part goes to another box beside the air cleaner that has a vaccum line coming off of it. the lower part looks to be full of tranny fluid! what is going on? when i turn the AC on it smokes very bad out of the exhaust. any idea where the fluid is coming from or what might be causing it?