In last days was made public a patent for an "automatic transmission for a vehicle", applicant FCA US LLC, inventors Berthold Martin and Glenn Giudici. Patent (WO2017136115) AUTOMATIC TRANSMISSION FOR A VEHICLE priority date: 02.02.2016 https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2017136115&recNum=3&maxRec=449&office=&prevFilter=&sortOption=Pub+Date+Desc&queryString=ALLNAMESFCA)&tab=PCT+Biblio PDF file: https://patentscope.wipo.int/search/docservicepdf_pct/id00000038865225/PAMPH/WO2017136115.pdf The core of the patent is a clutch arrangement, used instead of one of dog clutches, to improve shifting performance of the 9 speed automatic transmission (948TE / ZF 9HP). From the patent description text: "...  In contrast to the typical nine-speed automatic transmission 900, the nine-speed automatic transmission 10 of the present application includes a friction disc clutch as clutch element A. Unlike a dog clutch, disc clutch A provides a smoother and more immediate engagement during shifting, thereby eliminating the rotational synchronization requirements before and during engagement that can cause subsequent potentially objectionable time delays when shifting. As such, disc clutch A provides improvement in shift time and shift quality. Moreover, disc clutch A can be packaged within transmission 10 without extending the length of the typical nine-speed transmission 900, thereby enabling automatic transmission 10 to be used in vehicles designed to accept transmission 900 ..." "...  The systems and methods described herein provide an automatic transmission with improved shifting. The transmission replaces a typical dog clutch arrangement of clutch element A with a disc clutch arrangement. The replacement is such that no change in length or size is required for the transmission. Moreover, the disc clutch A is radially nested within the envelope of the B clutch, which improves packaging. The disc clutch A arrangement eliminates the need for rotational synchronization and subsequent time delays in the transmission function associated with dog clutch A arrangements. Accordingly, the disc clutch A arrangement improves vehicle function when shifting to drive (D) from park (P), reverse (R), or neutral (N), and improves shift time coming out of 8th gear. ..." Figure 4 of the patent illustrates main differences. The revised(/new) transmission includes now only a single dog clutch.