* 5-speed automatic: This was the most common transmission.
* 6-speed manual: Available on some V6 and V8 models.
* 8-speed automatic: This was available on higher-performance models (likely later in the 2010 model year, as the 8-speed was a newer option).
To know for certain what transmission a *specific* 2010 Dodge Charger has, you'd need to check its Vehicle Identification Number (VIN) or the vehicle's documentation.