Great, the replacement is a *six* speed automatic. Because 5 speeds
don't shift enough as it is. IIRC, Ford didn't offer a 5 speed on
their recent miivans specifically because the current 5 speeds shift so
much that they're annoying. God knows the 5 in my dad's Honda minivan
does. even with the cruise on, it's STILL at a loss as to what gear it
should be in.

In contrast, a 4L60E behaves just fine, and behaves better around town,
too. Hopefully, GM's six speed will be as well behaved. Really, when
you get down to it, GM's automatic transmissions are the best out
there...