Driveline vibrations are easy to feel, but solving them can puzzle even the most methodical of knuckle-busters. Does your car have the highway vibes? Just sending your driveshaft out for a balance job ...

The phone call to the Tremec tech line went something like this: "Yea, I just bought your Magnum six-speed and put it in my car. The overdrive is great, I love it but now I've got a vibration that ...