#10-speedTransmission

We moved past three on the tree. We’ve long since bid farewell to four on the floor. The ZF six-speed automatic transmission that helped to make the 2001 BMW 7 Series seem so forward-thinking at the dawn of the millennium was usurped by a seven-speed unit from Mercedes-Benz a couple of years later, and then by the Lexus LS’s eight-speed automatic in 2007.

Nine-speed automatics are all over the place: in the 2017 Acura MDX I’m driving this week, in numerous Fiat Chrysler Automobiles products, and in ten General Motors models by the end of 2017. Now the most popular line of vehicles in North America, the Ford F-Series, is arriving at dealers near you with ten-speed automatic transmissions.

But when is enough enough? How many gears is too many? Are there diminishing returns as the number of gears in an automatic transmission increases?

GM says nine is enough. Okay, ten is plenty if you insist. Ah, whatever, maybe more would be wonderful.

Ford’s plans for the Mustang may include their 10-speed automatic transmission, jointly developed with General Motors, and a Mach 1 version, according to Automotive News (via Motor Authority).

The amazingly engineered 10-speed, which will make an appearance on the new Ford F-150 Raptor, may be mated to Ford’s four-cylinder EcoBoost engine in the Mustang in the U.S. — and only in the Mustang — which feels weird.

But Mach 1(!)