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Cherokee back in limbo

by David Zatz on

The Toledo Blade discovered that Chrysler has still not been shipping Jeep Cherokees to dealers, though some systems claim they are in transit, and lots which held large numbers of the new vehicle have been emptied. The news was confirmed by Chrysler’s Jodi Tinon, who also said that the second shift at Toledo, hired on August 19, has been idled to avoid “strain on our logistic partners” once the vehicles are released. Original StoryAutomotive News coverage

ZF 9 speed automatic transmission controllerRumor from some sources suggests that the problem may be in the transmission software. The nine-speed automatic has a complex control system, which can be set up with a large number of different shift maps to meet different conditions; having all the shift maps pass EPA scrutiny may be difficult, and problems in any of them, discovered in extended testing, can cause delays as solutions are found and re-tested.

The number of control maps in the nine-speed has not been released to Allpar, but the eight-speed automatic has forty different maps to change shift patterns based on operating conditions. This number is below the transmission controller’s capacity; some manufacturers may use more complex (or at least more numerous) controls.

David Zatz founded Allpar in 1998 (based on a site he had begun in 1993-94), after years of writing reviews for retail trades. He has been quoted by the New York Times, the Daily Telegraph, the Detroit News, and USA Today. Before making Allpar a full-time career, he was a consultant in organizational psychology. You can reach him by using our contact form (much preferred) or by calling (313) 766-2304


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