In 2020, Fiat Chrysler America remembered 67,248 units of the 2014-2017 Jeep Cherokee in the United States for a transmission problem that could result in a loss of power or a rollaway situation. At that time, the documents filed with the National Road Traffic Safety Administration he explained that some “vehicles have been built with a two-speed power transfer unit (“PTU”) that allows for relative movement between the input splines of the differential and the output shaft of the transmission.” The movement could wear the input splines, causing a loss of engagement between the transmission and differential, thus reducing power to the front wheels. Worn splines could also prevent the transmission from engaging Park when stopped, leading to a possible rollover situation. That recall only applied to all-wheel drive models with the two-speed power transfer unit, which simulates the two-speed transfer case found in many part-time all-wheel drive vehicles truck and SUVs. Jeeps Mark affected systems as “Active Drive II” or “Active Drive Lock”.
Vehicles among the recall population that featured the PTU model in question benefited from “stronger differential splines”. The fix for recalled vehicles was not to replace worn PTU splines with updated versions. The fix consisted of a software update that worked around the fault to warn the driver, to transfer power to the rear wheels when the malfunction occurs or to apply automatic parking brake if the fault occurred while the driver was attempting to engage park.
What’s weirder is this Jeep has issued a new recall for a subset of the original recall population, addressing the same issue with the same PTU part numbers. Only 25,980 Cherokee affected this time, only 1% thought to be afflicted by the PTU problem, but expands on the previous population of 67,248 units. The language in the safety recall reports is identical, only the build dates have changed. The 2020 recall affected SUVs built between April 14, 2014 and October 10, 2016. This new recall affects SUVs built between September 3, 2015 and September 23, 2016.
As before, the solution is software. The new safety recall report copy the 2020 version saying, “The remedial component will be a software flash which, if there is a failure of the input splines, causes a malfunction light to illuminate, the rear axle to engage to prevent a loss of driving force and activation of the electronic parking brake when the vehicle is in PARK to avoid loss of the PARK function.” Considering the expected 1% of the affected population, this tells us that Jeep wants to use the software to find problem vehicles that need a day out. of the dealerinstead of inundating dealer technicians with long fishing expeditions in 93,000 Cherokee broadcasts.
Jeep says it will begin sending notification letters to owners on June 16. Until then, owners can contact the FCA customer service at 800-853-1403 and mention internal recall 45A; previous recall was W47. Owners can also contact the NHTSA Vehicle Safety Hotline at 888-327-4236 (TTY 800-424-9153), or go to www.nhtsa.gov, and refer to campaign number 23V-302.
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