It is all designed so that the trans can be removed without removing the rear end or the enging.
Unbolt the bell at the rear of the trans and slide it back to access the ujoint assembly. Unbolt the ujoint assembly and slide the yoke back and lower the torque tube. Don't just let it fall, the bell will be damaged. The trans can now be unbolted. Two bolts inside the bell housing and two outside. The trans is heavy, but depending on your strength you can strong arm it out. It is best to use a jack or a cherry picker.
