I recently had my head gaskets replaced, along with the timing belt, tensioners, and idlers; spark plugs; water pump; fan belts; front main seal; and AC idler. This was very expensive (2600.00) and my mechanic charged me 20% more than his original quote. Five days after I got my car back it started smoking under the hood while I was driving. It would rev up, but only go about 5 miles an hour. I trucked it back to my house with smoke still pouring out, and then transmission fluid gushed all over my driveway. Any advice on what to do here?