Let Me Know if You Have Allison Transmission Fluid Questions

I had a similar issue when I changed over to Trans Syn. The shop changed the oil (power flush) and filter. When I climbed the hill out of Laughlin some oil blew out of the breather on the top rear of the tranny.. I've since left it a little low on the dipstick because I'm worried if I fill it right up to the top of the marks it will happen again. This was a few years ago and I have'nt had a problem again.