I dont remember C-6 trans having electronic kick downs,are you sure its a C-6 not a overdrive trans. Post some pics of the trans and I can identify. I had a 87 F 150 that had a C-6 that still had the mechanical kickdown so I think you might have a E40D that is computer controlled but if you have a AOD trans it will have a cable that controlls the shifting. I dont think you have a C-6. Jeff