If the shifts from a sequential shifting manumatic (like my word-ology there?) transmission was as fast as Ferrari's F1 transmissions, paddle shifting would be the 100% best way to go. Ferrari's transmissions shift gears in just a hair over 10ms. These, however, are not clutch-pack style autos with a manual valve body. They're basically standards with a triple-disc actuator-controlled clutch. The shifting is performed by servos and the clutch is controlled by a computer. Paddle shifting is the only human interaction. Although those transmissions are the most efficient and strongest transmissions, they're unfortunately $20,000+!
So in that aspect, I agree. However, some stuff can be done to an automatic to make it work similar to these transmissions, although shifting will NEVER be as fast as these monster racing transmissions.
Upgrading the springs, planets (and planet carrier) and upgrading the clutch packs would be a good start to strengthening your transmission. Once you've done that, you can increase the line pressure on the valve body. (This would actually be quite healthy for the transmission's clutch packs) and that would increase the speed and firmness of the shift. There are kits you can buy for around $30-40 that are basically solenoids that will increase and decrease line pressure on a switch (allowing you to go from stock shifting speed/firmness to faster/firmer shifts). Although I don't recommend doing that until you strengthen the transmission.
If you REALLY want to go crazy, you can rebuild the transmission with a bigger sun gear, more planes, and TIGHT springs. Doing so would allow you to handle LOTS more power. Although, it won't be necessary to do that until you break the 500BHP mark.
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2002 Corvette Z06 - Totaled
2003 Corvette Z06 50th Anniversary
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