Actually just got done doing this myself. Here is the external link to rebuilding the Drac Motor http://www.iobium.com/rebuilding_the_monster_bash_drac.htm

From what I recall, do the following

1. Raise the PF and loosen the two hex nuts on the drac arm to the motor
2. Disconnect the Drac motor connection from the board
3. Remove the (4) bolts from the Drac motor and remove, then follow the directions in the external link
4. Remove the additional (4) bolts to remove the next level of the Drac motor mount, this will then give you access to the light board
5. Optional, if you want to remove Drac on top, then remove the plastics and slide him over to the hole.

To get to the Cliffy, you have to remove the post that's behind the scoop. The nut is located on the underside of the PF, directly behind the scoop.

Good luck