I jumped in my car last night heading home from work. Noticed that it was extremely difficult to get the car into first, then a little easier into 2nd, etc. Figured it was due to the cold.(~45 deg.) I noticed while driving home last night that the clutch felt different. Pedal still has full travel, but seems to me completely disengaged only about 1" off the floor.
Jump in the car this morning (~55deg), fire it up, let it warm up for a min. Push clutch in, car won't go into any gear. Nothing grinds as I try to put it in gear, but I can feel the car lurch ever so slightly. Shifter moves freely left and right, I just can't push it into any gear.

A little more background. The past few months, the clutch pedal would "change feeling". Sometimes when I would drive, it would be a little more firm than other times. Sometimes, a little less firm than average. Now, I'm not talking huge differences that would greatly affect or change the way I would have to drive, but it is definitely noticeable. Maybe there is a clutch adjustment that needs to be made?

Car is a '91 300zx TT, ~100k, daily driver while the weather is nice.

 

Check for leaks/problems in the clutch hydraulics... likely a bad slave cylinder (cheap to replace, only about $25 at any auto parts store). Refill fluid, bleed, done.

 

Thanks for the info., i'll start there. ChicagoZ.com FTW!

 

2nd the slave

 

could be slave or master, pull boot back on slave if fluid leaks out the slave is bypassing, if there is brake fluid running down your firewall its the master.

 

... he hasn't responded in a week and a half... I'd then suspect the problem was resolved and was the slave cylinder as I suggested

 

sorry never really paid attention, i was at th very top so i kinda assumed it was recent, these forums must be dead then....

 

for the record a new place for a leak that i've recently found is where the hose goes through a bracket that has insulation in it, mounted to the passenger side firewall. the insulation holds moisture and rusts the hose, and it blows a leak. happened to me a few weeks ago.