The new 845RE transmission is manufactured by German transmission specialist ZF and is similar to eight-speed transmissions developed by ZF for a variety of Audi, BMW, Bentley, Range Rover and Rolls Royce models.
Buy a Chrysler and get a Rolls Royce transmission? Not unless you're fresh off the turnip truck.
Chrysler's reputation precedes it. I wouldn't want to be the first on my block to buy a Mopar 8-speed automatic transmission, even if it's made by ZF. The Jatco CVT installed in some Chrysler models was reportedly much less reliable than Nissan versions. One suspects vigorous, targeted cost and corner cutting.