My car is still under full warranty until mid 2006. The seal would be warranty work. It really is a simple job, and i could do it myself in an hour, but i don't want to touch a brand new car if i can help it.
As for the TSB, it's a current issue regarding the T-3650 5-spd in 01-03 Mustangs. WHat happens is the 1-2 shift and 2-3 shift is very clunky and notchy when it's cold out. This is what my problem is but there is a 50+ page tech post in the 4.6L forum with other 01-03 owners who have the same problem. TSB 04-15-06 came out in mid-June, and i waited til a few people had it performed. They are reporting good things so I wanted to bring my car in and have the fix performed. It IS covered by warraty as long as the car exhibits the problem and is under the 3 year/36,000 mile mark OR the dealership documented you have the problem before it expired if in fact it is expired. The fix replaces a good chunk of the tranny internals such as 2nd gear, 3rd gear, 1-2 synchro, 3-4 synchro, shift forks, shift rails and other small peices.
If you can't tell, i've been doing my homework on this issue. Now i'm trying to find a good local dealership to perform the work and one that won't treat me like some 16 year old kid who doesn't even know how to pop his hood like i have been lately.
If my car was out of warranty, i would do the work myself. I've rebuilt T-5's before. It's a peice of cake. I have the service manual for the T-3650 and it looks very similar in design. I would have no problem ordering the parts, dropping the tranny and replacing the parts myself. But I shouldn't have to do that anyway. I just hate dealing with dealerships. I don't mean the people who do the actual work, but the people at the desk you need to convince to get the work done. So far the ones i've made pre-lim phone calls to treat the customer like they don't know anything about cars. I had one guy actually explain to me how a tranny worked and how it's normal to feel a clunk when you shift because the gears are meshing. NO ****!! I KNOW THAT!! Is it normal for the car next to you to hear the gears clunk together?? NO!
Sorry for the rant

Some of you 01-03 T-3650 guys should know what i am going through