You can tell when the transmission gets hot because the shifts will get a little sluggish. Meaning that when you press the paddle there's a little delay in the shift. Unless you are shifting a ton you'll run into oil temp issues first.
IMO its a waste unless you've upgraded your oil cooling system. Then you might be able to overwhelm the DCT cooler.
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2018 F30 320iX Melbourne Red
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red
2000 E36/7 Z3 Steel Blue
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