This week on Car Talk, the perfect tool. No... that's not what we call Tommy behind his back at the office! But it is an insight into the mind of the Do-It-Yourselfer. Then it's off to North Carolina to counsel a mom considering buying a muscle car for her 16-year-old. And we try to keep Andrew in Connecticut from ruining a father-son relationship over a measly clutch. An engine, maybe. But not a clutch!