I'm trying to find some information which might be useful for me to know. I have read many, many reports about the clutch components used in the TR-6. I have also read many, many articles and reports of poorly designed parts and just as many remedies and suggested replacement parts. I find that everything from the pressure plate to the thowout bearing to the hydraulic cylinders has been suspect and categorically blamed and hearalded, depending on who's words I am reading. It seems odd, there is still no overwhelmingly obvious fix that everyone agrees on and addresses the problem once and for all. If there is, I have not read it yet. While I'm at it, does anyone have information concerning the clamping pressure of the various pressure plates that are available. I don't mean release pressure-when the clutch disengages. I mean how tightly do the various pressure plates compress the driven clutch disc when your foot is off the pedal. I know if you have a zillion horsepower, you need a heavier pressure plate. If you have very little horsepower a lighter pressure plate will be sufficient to prevent premature wear of the friction material on the clutch driven disc. I cannot find much info except that BPNW lists two different Borg & Beck clutch kits that show a clamping pressure of xxx and xxx "dn"s. Can anyone tell me what a "dn" is ? Another bit of information I would like to find if anyone has it, is how far does the friction surface of the pressure plate move when the fingers are pushed. Do the fingers bend appreciably ? I know there are some people who have made tests and calculations on hydraulic pressure and lever-arm ratios and such. I cannot find anyone who has looked at and reported the lever-arm ratios in the various clutch pressure plates. The (long lever-arm) ratio between the diameter of the throwout bearing contact surface where it pushes on the fingers on the pressure plate diaphragm and the diameter of the pivot ring or circle of the diaphragm (fulcrum) and the diameter of the outermost edge of the diaphragm (short lever-arm)where it pushes on the back of the friction surface of the pressure plate. Any help would be appreciated.