I have a Garmin NAV system in my car, Kenwood DNX-9140. I needed to enable the traffic function and found a great solution in the "TMC in Garmin Nuvi" thead. This worked great on my Kenwood DNX-9140 running Garmin NAV and GTM-10. I enabled both the NAVTEQ and TTN traffic. I used Keygen 5 digit with the codes provided in post #119 for USA. The subscription key can be entered either upper or lower case into my DNX09140.