HI, I RECENTLY BOUGHT A 1990 NISSAN 300ZX NON TURBO 5SPD. I GOT THE ENGINE RUNNING BUT WHEN I PUT IT IN GEAR THE CAR DOES NOT MOVE. THE TRANS FEELS LIKE IT IS IN GEAR AND DOES NOT MAKE ANY STRANGE NOISE. THE CLUTCH WAS SUPPOSED TO BE NEW? THERE IS A NEW CLUCH MASTER AND SLAVE CYLINDER THAT CAME W/THE CAR NOT YET INSTALLED. COULD THIS BE THE PROBLEM? MY THOUGHT IS IF THE MASTER OR SLAVE WAS BAD THE CLUTCH SHOULD BE ENGAGED NOT DISENGAGED? ANY HELP WOULD BE APPRECIATED. THANKS, BOB

Being 1991, and a sport car, good idea to go ahead and replace slave cylinder since you have them and very easy to replace. If you able to push your car while is in any gear more likely the clutch pad pressure plate are worned and slipping. If you can push the car while is in gear even the engine is not running than it will be your clutch pad and your presure plate is shot that would mean you tranny has to come out. once you in the tranny you might as well replace with new clucth pad, pressure plate and throw out bearing. Also check your fly wheel make sure is not ate up. if it is then you will have to have the flyweel resurface by a machine shop. using the lift is the best way to work on the Z. most garage will charge 400-500 to do the work.