I have the weirdest thing happening with a zf6 clutch..I can't get the truck to go,in gear with clutch depressed so I started truck with truck in gear,it started to move forward.after I got truck started I let clutch out slowly and truck STOPPED moving..so I pushed clutch back IN and the truck started moving..I can run through all the gears,all forward and reverse with clutch pedal out and truck running..but when I depress,clutch pedal the truck moves..like the clutch is backwards or something..anyone have any idea?? I just spent 800 on a south bend but this is weird..