I checked howstuffworks.com and a few other sites - very light on details Referring to the diagram below .. Pulling in the clutch handle actuates the clutch slave cylinder (22), pulling in on the push rod (13). The push rod pulls back on the inner clutch plate (5). Does the outer clutch hub (1) come back with it? Looks like it does. So now (5) and (1) are pulled back. Now what? I'm guessing that the clutch discs are what make the transition smooth, but since they're toothed on both sides, they must have to slide out to rub against each other. Also, what's the deal with the springs (8) .. how do they come into play? If you treat the clutch as a "black box" with an input gear and an output gear, I'm guessing those gears are located on (1). Which is the output and which is the input? Thanks guys.