There have been multiple recalls, service bulletins, and changes in the 9 speed transmission to address serious problems.
Jeep and Land Rover showed the first nine-speed automatic transmissions of the world at the 2013 Nobel Geneva Motor Show with the Jeep Cherokee 2014 the first nine-speed automatic transmission commercially available.
Automotive supplier ZF is recalling a control sensor found on nine-speed automatic transmissions used in over 500,000 vehicles. Fiat Chrysler, Honda and Land Rover models are affected. The transmission can shift into neutral at any speed or gear because of an insufficient crimp on a wiring harness attached to the sensor cluster. Models affected include the 2014-16 Jeep Cherokee, 2015-16 Jeep Renegade, 2015-17 Chrysler 200, 2015-16 RAM ProMaster City, 2016 Fiat 500X, 2014-17 Range Rover Evoque, 2015-17 Land Rover Discovery, 2015-17 Acura TLX (V6) and certain trims of the 2015-16 Honda Pilot.
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2. Software Changes and Updates
A Feb. 2015 story explains.
Now the automaker is offering a solution by way of software updates. The reprogramming of vehicle computers is said to cure issues of “hard shifts, lunging, unexpected disengagement of the transmission, and repeated illumination of malfunction lights.” Those complaints come directly from customers filing reports on the safecar.gov website.
FCA U.S. will begin to notify owners of 2014 and 2015 Jeep Cherokees along with owners of some 2015 Chrysler 200s powered by the 2.4-liter four-cylinder that the reprogrammed software is available at dealerships. In an interview with Automotive News, an FCA U.S. spokeswoman said the updated transmission software is “intended to keep the vehicle performing as intended, and to prevent durability issues from occurring in the future.”
This is hardly the first issue had with the nine-speed unit. The Cherokee’s original launch was delayed three months. http://www.topspeed.com/trucks/truck-news/jeep-cherokee-gets-software-update-for-problems-with-the-nine-speed-automatic-transmission-ar167506.html