Here's a scenario for you: One day while you're driving to work, you are abruptly alerted to the fact that something is not happy in the rear end of your ride. Maybe something has either A) broken, or ...

Not to worry, Ava. My wife tells me my rear end is completely gone, too. But she’s still sticking with me. The “rear end” is your mechanic’s shorthand for the differential. The differential is ...