Took intake manifold off to change plugs and a fuel injector (1 cylinder was missing). After putting it back on, I had 1 small vac hose that I couldn't find where it went! I started it anyway and transmission fluid started overflowing at the dipstick. The Haynes manual said it might be the vent or the drain back holes blocked. What vent, where and how do I check these drain block holes? I'm assuming that the mystery vacuum line is playing a big part in this problem, but I couldn't find where it plugged in. Any advice would be much appreciated! Thanks in advance, guys!