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Is there any way to make the stock automatic shift at a higher rpm and harder?

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Is there any way to make the stock automatic shift at a higher rpm and harder? Mine shifts out at about 6200rpm and will get rubber in second now that I turned the boost up to around 18psi. It is shifting harder with the higher boost, but it is still not really banging the next gear and it seems like it is losing something in it's shifting. I want to get it to shift at a higher rpm in Drive, not manually shifting it.

Swamibob
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shiftning

I don't know exactly about the electronic for shiftning controll in a Supra but in other cars you can reprogram the box to shift at any Rpm that you want and tell it when to shift down and how much and so on...think it's possible on a Supra too.

Harder?, Pull the tracfuse and you'll smasch the gears in, not recommended I think, but those who have tried, most auto owner except me I think, ....

Don't know how much damage it will do at BPU on a stock tranny.....someone?

Shall I pull the fuse in mine too?

I'm thinking of making the fuse pull to a switch from inside, that shouldn't be much problem, then I can "pull the fuse" from inside whenever I need to.
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