So I recently bought a 2011 Malibu at a auction for $3400. Seemed good for awhile and engine is strong. But I just got the po776 code and having transmission problems. What is my next step to take. As this is my first Malibu purchase.

Noticed today when I accelerated harder than usual. Usually don't but car was closer than I thought. rpms where around 3000 rpm and then it shoots up a couple hundred and then drops down after that it shifts. The car shifts fine though. Just has worried. 2011 malibu 2.4 with 6 speed automatic...