Hi guys im having an interesting issue with my z. 2003 34k miles on it, anyways i know the car had its tranny replaced in 2005. The car does not grind, sometimes it very notchy primarily after its been on for a while but for the first 5 minutes the car shifts and acts fine minus 1st to second which sometimes feels like it gets stuck in first so i usually shift through all gears before i start going .The clutch gets a real spongy feeling like its not holding the power or weak when i push it and shift. The gear notchy doesnt happen till a few minutes later. Anyone know where i should start looking? I just bought some Sythn tranny fluid but i dont want to put it in yet incase i should do something else first. Thanks Nick