I would check the fluid level before jumping to any conclusions. The cover that protects the tranny will need to be removed. Then look for a plug just above the tranny pan, to check the level, passenger side. You must remove the plug, then stick your finger in to check the level. If your car has more than 50k miles on it, I would suggest changing the filter & fluid, to see if that works. If the fluid is dark & burnt smelling, you might want to check a little further. Change the Mechatronics' seal while you have the fluid removed. It will cost around 275.00 for all parts & fluid. There should be a DIY in that section.