Love my 08 KK, bought used with 52K miles. Issue is with both Front Power Seats. If seat is not all the way back, or all the way forward, but in-between somewhere.... The seats will shift back/forth 1/4 to 1/2 inch with each acceleration or brake. It's enough of a movement to startle you everytime. Have checked many times, nothing is loose anywhere under either seat. It seems that all the movement is within the tracks themselves. I have searched and searched, nowhere can I find anyone complaining of the same. Nor can I find a "kit" or repair parts for the track, sliders, gears, etc. Any advice would help.