I've read the VVT 5.7 is more fuel effecent than the MDS . Not sure if that is engine to engine or MDS auto VS VVT with 6 speed. I have 06 300C that has gotten a best of 27.5 long trip and mostly cruising about 70 mph. But avg. mpg is 18 or 19 with my wife driving it to work . So far my 09 R/T 6 speed with 3.92 has gotten 25 highway and average around 20 mpg . About the same depend's on my right foot. LOL.
ORIGINAL: tskatz
I just read a response from a Chrysler engineer in one of the Muscle car magazines. He stated that you had to order the six speed manual to get the posi rear end. It's similar to the fact that you can't get an MDS Hemi with a six speed transmission. I just read this in one of the current Muscle car magazines on the news stand. I bought the magazine but it's two flights of stairs down and the point will be the same.