904 squirting

Wait what? Air? How do I get air in the system, and more important, how do I get it out? :S

You said you replaced the transmission, right? Any time you do that it is a natural occurrence to get some air in the system upon assembly especially since you said the transmission had been setting for 8 yrs. so every drop of ATF probably drained out of it. If you re-read my post I said the air works it's way out of the system naturally so there's no need to over-think this and worry. It'll be fine after a trip around the block.

Altso I broke part of one of the cooler pipes while unscrewing it from the trans, the guy at my local amcar-store said I could just cut it and place a fuel hose there because the pressure there was kind of low, but is this true or could that be the problem?

DO NOT USE FUEL LINE TO REPAIR A TRANSMISSION LINE!! Stupid auto parts guys will tell you that it's ok but it's not. Fuel line is not up to par for use with ATF and may very well fail. Find some low pressure hydraulic return hose (power steering return hose works if it's the same diameter) and use it, or if there's not much line missing you can use a compression fitting to repair it.