I am trying to put new speakers in my girlfriends 85 diplomat and I cant for the life of me figure out how the damn back seat comes out. If anyone has any idea it would be a huge help...thank you.

Seat bottom:
push down on the seat bottom on one side.
with your knee, kick the seat (still pushing the top down) to release the clip.
do the same on the other side.
pull the seat towards you and remove the seat bottom.

seat back:
Locate the two retaining bolts on the left and right. Some leather interiors also have two additional bolts in the center.
pull the seat back out from the bottom, and stike the bottom in an uppward direction to remove the seat from the top hangers.

The rear speakers are accesible through the trunk, though....

Tom