Hey J-13 mine was making that hissing sound (i thought it was the thrust race) but as fate would have it with diy installs it only happend when the car was cold........When it gets warm though its allright it just took a bit of soft driving to bed it in i think.....say a hour or two drive in moder8 traffic conditions.GTR-MAGEDDONIT may be right your point of grab adjustment could be the answer.... Hope this helps....Another question can hydraulic clutches be adjusted like cable clutches?