passing gear

I am no expert on kickdown adjustment but, from what I've read and done your cable should have no slack in it and fully engage at wot. I do believe the adjustment can be a little tempermental. Unhook the kickdown and hold the throttle at wide open and then manually pull the kickdown out to see if the kickdown fully engages when the throttle is wide open, and also checking to make sure the cable lines up with your attachment point. . Also make sure you don't have slack in your throttle cable. I did that once and my kickdown also would not engage. Good luck!