The following information was posted on allpar about the 2010 Challenger:

"For 2010, the five-speed automatic finally replaced the four-speed across the board. The long-rumored 6.4 liter Hemi V8 may appear for SRT8 models (with cylinder deactivation for reasonable gas mileage), and the Dodge Challenger will get deceleration fuel cutoff to improve gas mileage — even on automatics.

Super Track Pack is confirmed an R/T option with the manual transmission, including summer tires. Stability control is standard on all models; automatic with LED cup holder and door-handle lights are standard on R/T.

Changes to the Challenger SRT8 are a new limited edition Plum Crazy model, serialized dash plaque, and plum seat-stripe insert."