Sorry to revive an old thread but for anyone who has encountered the same issue (clutch not disengaging),.. you might have installed the disc backwards. If you did,.. HOPEFULLY it isnt snagged on something. Take the tranny back off,.. remove the clutch disc and ensure that its on the correct way. If you're not able to remove the transmission (feels like its snagged on something),.. you might have fused together the clutch disc with the transmission dust cover that goes over the input shaft - Good luck in getting that off! you might as well smash the bell housing with a hammer to get it off and buy a new transmission.