I was hoping you guys could help me. I have an 87 firebird that i put a chevy 350 into. I am using the stock t-5 with a centerforce dual friction clutch. it is also a stock slave cylinder. I am having a problem shifting at high rpm. When i go to shift it does one of three things. It either will not come out of gear, It just won't go into gear quickly. or if i try to shift real fast it just grinds. Also sometimes it won't go in to gear for about five seconds after i take it out of gear. if I am stopped in 1st and rev past 5,000 the clutch starts to grab and my car moves forward. I know my synchro's aren't the greatest but I'm more worried about do I need a new clutch or slave. Or could there be air in the line. I have heard bad things about centerforce but i am not sure if that is the problem. any input would be helpful thanx.