Clunking sound from tranny

When i take my car above 3000 rpms, a knocking sound appears it seams to be coming from the tranny? its like a clunking sound. sometimes it does that when im at a stop or slowing down. I just bought a new transmission and clutch but before get those installed i want to be sure its the tranny. what do you guys think is it something else?

knocking sound you say…to me i think it’s the engine.

does the noise go away when u push that clutch pedal in?

my second car is a 240sx and i had the same issue i thought i blew it up but it was something n the tranny

its not the motor. the sound seems to be beneath me. I’m not sure, i think it might be bad bearings or maybe i need new bushings?

Does it go away when u push th clutch in?

If it clunks when you are at a dead stop its not your transmission.