I would talk with the dealer that performed the tsb and let them know the issue is recurring. The dealer can check if there has been further software updates for the transmission. Also, per the owner's manual, the automatic transmission fluid and filter(s) should be changed at 64,000 miles or 48 months whichever occurs first, if using your vehicle for any of the following: police, taxi, fleet, or frequent trailer towing and to change the fluid at 120,000 miles or 90 months whichever occurs first.