Hissing sound in drive and reverse. Vacum Leak?

[adub98]

Hey guys, title says it all. I don't have any codes or loss of power. MPG could be better in town but I got 20 on the freeway last month on vacation. I really notice the hissing in the drive through because the sound bangs off the wall. I'm thinking vacum leak. What do ya'll think?

 

[my98nnj]

I've got the same noise, more so in reverse.
I think it's coming from the tranny, possibly the pump hissing?
Car runs and drives great, MPG is a little low but most of my driving is local streets.

 

[adub98]

Oh great the tranny huh. So not a cheap fix? If that's the case, I'll just run it til it blows and figure out a plan when I need to. I was hopping the SOHC has a common leak somewhere and I would be a matter of putting a new hose on somewhere...

 

[adub98]

Anyone else got any ideas? Not discrediting my98nnj at all, just looking for all the possibilities.