Jeep, Chrysler, Acura 9-Speed Automatics: Supplier ZF Offers Tips

[NewsBot]

The arrival of nine-speed automatic transmissions—and some hiccups in tuning—in several mass-market models this past year has led some to wonder whether more speeds is necessarily a step forward. While the better mileage and stronger acceleration that more speeds can allow, drivability, it seems, has been lacking in some—yet not...

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