I'm having a problem with my 98Z. I can't get it to go into any gear at all. The only way I can get it into a gear is to shut the car off, put it in gear, then turn it on, other than that I cant even force it in(which I really dont want to do anyway). Also the clutch is real sloppy now, and when its pressed all the way to the floor its still engaged a little bit. My clutch seemed fine until this happened, and i wasnt screwing around when it did happen......Any ideas???? Thanks.

 

If the clutch is sloppy and wont go into gear, that sounds like the problem or the slave cylinder which is inside the bellhousing on your LS1 not engaging/disengaging the clutch correctly. Probably going to have to drop the trans and find out.