Since I had this trans replaced on warranty once (known issue) can it be beefed up if I add power adders to engine?

 

To my knowledge there are no performance type upgrades other than the update for the cooler line, the cooler line is now built with a "T" that drops into the fill plug for 2nd gear train lubrication. There is an update that is just coming into the market, this update is aftermarket and reverses the cooling system which takes the ATF from the transmission to the traditional cooler. Check and see if your trans cooler line has been updated already with the "T" when replaced under warranty.