so i rebuilt my t-5 tranny that is in the 67 now; the tranny is from an 87 gt mustang. i bought a complete rebuild kit and video from Hanlon motorsports. after rebuilding and installing my tranny, i noticed that when i am drving it, it will clash 4th gear. when downshifting it will clash 4th and sometimes clash when i downshift into 3rd. when driving it to work today i had issues come up with 3rd. sometimes, it wont go in all the way, so it will pop out of gear. i also had it get stuck in 3rd when it was parked. after moving the shifter around a lot trying to get it out of gear, it came out. anyone have an idea of what is wrong?