86 daytona z with auto trans. when rpms drop just under 2000 trans will downshift into second. will not shift back into third until rpms get around 3000. trans has been a bit sluggish from a dead start. sometimes gas pedal is tuff to push. also, on the highway, it will not kick down to passing gear even if i jam the pedal to the floor. tried adjusting the kickdown cable but there is still the same issue. can anyone please help. thanx, justin.