Re: Transmission Breather Fix
Sandracer1 is correct. There is no real pressure build up, but once the oil gets slung into the breather line, it continues to push the oil out on long extended runs since it is difficult for air in the transmission to "burp" past the oil in the line allowing the oil to re-enter the transmission. I've actually seen oil push a couple feet up a line into a breather on my old Riot (had clear breather line). With a second breather installed very little oil actually gets into the breather line and what is left easily flows back into the transmission.
Another advantage to the second breather line: I use a small funnel with a piece of hose and use the second breather for my fill point on the tranny.
2009 Redline XL Turbo