hey guys,i am in a jam.i am in the middle of installing an engine my 1991 exploder(4.0)the motor rotated on the stand by hand,but i just dropped it in andwas trying to connect the torque converter when i discovered something binding the motor.all tranny bolts are in,i can put two converter nuts on but when rotating to the third something stops the rotation just short of the third bolt .either direction it stops just short of the bolt.helllllllp!