Not so long ago, dual-clutch transmissions -- with their superior fuel economy and lightning-quick gear shifts -- were widely viewed as the Next Big Thing.
Automakers were counting on those gearboxes to improve fuel economy ratings 6 to 10 percent without compromising performance.
Not anymore.
After Volkswagen introduced dual- clutch transmissions in 2003, several mass-market automakers followed suit, only to encounter quality bugs and consumer complaints.
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