The strangest thing started the other day. After I start my truck ('05 F150 5.4 XLT Supercrew), the slightest pressure on the brake pedal causes some sort of "clicking" sound in the steering column. It almost sounds like something is trying to actuate in the steering column, and I can sit there and slightly press the brake pedal over and over, and the clicking sound engages and disengages. It only happens when the column gear shifter is in Park. There's no problem depressing the brake pedal to shift out of park. Everything else seems to be working properly. The only recent upgrade to the truck is loading the custom tunes on my Gryphon CS - but the actual programmer has been installed for about 6 months now. Any ideas?

 

thats just the shift interlock you hear

... you can't put it in gear unless your foot is on the brake, right?
That is the mechanism.

I'm not sure why, but sometimes it is louder... I think perhaps due to the steering wheel position.

 

Mine does it too, but the sound of my exhaust and new gears kinds of covers it up.