Originally Posted by
TransGo Robert
It makes no difference as far as shift time that a human could feel. We are taking about maybe a milisecond or two, that little return spring resistance and clearance gets compressed way before the shift even starts, during the servo phase for the applying element. The clearance is only important to ensure you don't have too much drag when the clutch is released, at the same time not to have unnecessary apply piston travel causing the lip seals to wear faster. It is all builders preference really and also varies quite a bit depending how you go about measuring the clearance. You can't go wrong using the specs for the application you are working on of course, but none of this is really that important. Don't sweat the small stuff like the saying goes. There are hundreds of more important things to concentrate on when building a transmission to engine it works right and last as long as possible. However most of those things are not shown it factory or aftermarket assembly manual so people focused on those endplay and clutch pack clearance specs as if it was super important. It is just there so that you can tell if you have the right thickeness and count of friction disks ans steels really when all is said and done. And lastly, if you open a unit and a clutch pack looks like knew, don't complicate cornflakes, it was not broke so don't fix it, put it back together with the same clearance it had when you took it apart. After all you know that worked great.