I know there's quite a few posts about the back ramp need adjustment or not working, however i need help with the lifting mechanism. My ramp is binding when going down, opposed to it being a coil issue. It keeps attempting to come down when lock is on. When I try to activate the mechanism manually it still has strong resistance to do a full movement... I'll try and remove the rod that goes in the ramp and do a test to see if it still binds. Otherwise I'm thinking I'll have to rebuild the mechanism...