Tranny TSB done on 08' or older trucks??

i know about all the trucks on here that has had the transmission TSB done is 09' trucks...but i have a 08' and wondered about getting this done...if anyone with a 08' or older truck has succeded at this please let me know? cause i think mine kinda seems to have a ruff 1-2 gear shift

 

Wondered about this myself, I have an 08, and it shifts just fine 90% of the time, but here and there when going through a lot of hills it seems to stick in gear, and shift hard at times. Not enough for me to contact the dealer, but if people with 08's start getting it done I might consider it.

 

I have the same symptoms and mine is an 06'. I have been waiting to hear if any older trucks have it...subscribed.