No specific TSB for the Tundra tailgate, but take it in. I doubt they'll give you much grief, as by know they all know it's a problem on the early Gen 2's (to about April of 08 builds +/-). If you do get some slack, ask them politely if you can have an appointment with the regional rep to discuss the issue...the RR's know the deal and will approve the replacement...that's how mine got done, post haste. Didn't even have to meet the rep, he just approved the swap over the phone with the dealership. Once the new gate was received, they took my truck for 2 days to match the paint and I've been good to go ever since, no more separation and it matches perfectly.