Clutch Chatter
 

I replaced the stock 1991 civic si tranny with a ZC tranny and I used 1991 Integra LS non abs drive axle I noticed when i put it in first and moving at slow speeds there is a chatter before it takes off does anyone know whats wrong ? did i use the wrong axles? or something? I've done many tranny/Clutch installs but this never happed

check your tranny mount

clutch chatter could be caused by a bunch of causes. warped disc, burned disc, the tranny out of alignment with the crank centerline, sticking linkage, worn pilot bearing, loose mounts, loose transmission, etc.

I'd say just double check your mounts and bell housing bolts first before you do anything.