About a week ago my a/c threw smoke from the vent it smelled pretty musty. So today while driving on the highway I hear a loud bang noise. Car kept driving fine. Pulled over next exit looked at tires and engine and everything looked good. Then I continue driving for another 10miles to my house. When I go back to go to the store I put in drive and car only revs. I tried reversing and only revs. I can drive in gear 2 and car drove well. What can be the issue. Two weeks ago I just had a head gasket job done on this vehicle. Thank you.
My car has 193000 miles.
My car has an automatic transmission.
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