MY 06 PONTIAC G6 ROLLS BRAZEN WHEN PUT IN TO RETREAT WHAT COULD BE A PROBLEM?

My 06 pontiac g6 rolls brazen when put in to retreat what could be a problem? It doesn’t go retrograde right divided it kind of stalls afterwards goes behind though it rolls foward first. I’ve had a transmissin burning behind in febuary of this year though we was told which we can’t put delivery liquid [...]

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