If you suspect a problem with your Solstice's transmission, such as:
* Slipping gears: The car doesn't shift smoothly or slips out of gear.
* Hard shifting: The car shifts gears roughly or with a noticeable jerk.
* Strange noises: Whining, grinding, or other unusual noises are coming from the transmission.
* Fluid leaks: You see transmission fluid leaking under the car.
Then you should take your car to a qualified mechanic or a Pontiac dealership. Improperly adding transmission fluid to a sealed system can cause significant damage. A mechanic can diagnose the problem and determine the appropriate course of action, which might include a fluid change (if the transmission is designed for it) or more extensive repairs. Attempting a DIY fix is strongly discouraged in this case.