Transmission Fluid Leaking Problems of Chevrolet Sonic

First problem started when radio remained on after key removed from ignition. Radio would turn on and off when car was off and drained newly replaced battery. Advised to remove fuse as temporary fix. Car was also losing power when highway driving (up to 70 mph). I don't speed, but car struggled to go above 70 mph. Thought I smelled something burning, had radiator checked, oil changed, fluids added at beginning of October. Three weeks later on city street, slowing for traffic when car lost power. When traffic started moving, car continued to slow to complete stop in the street despite stepping on gas. Waited 25 minutes for tow, but when tow driver came, car was able to start and move. Less than an hour later, the problem happened again and car was towed. At mechanic, computer codes indicated low/no transmission fluid (even though fluid was added at oil change only three weeks prior). No evidence of leaks. Mechanic added fluid and went for ride on suburban back road, car lost power after 10 minutes. He had to wait approx 20 minutes for car to move again. He drained transmission fluid and found metallic bits, and says transmission would likely need replacing. Car has fairly low mileage �54k miles� and has been properly maintained. Also car was previously serviced because key was stuck in ignition.

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There was a shift flare when switching from gear 2 to gear 3. This would happen when the car was warmed up. When it was cold, it would not happen. There was no fluid leak.

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To begin, I have been having a shift flare problem with my automatic transmission. There are no trouble codes in the system. This would happen when I would get off the highway when there was a lot of traffic or when the car was running for a long time. The problem went away when the car was cooled and was parked for several hours. The rpm would spike about 200rmp when accelerating. This would happen from 2nd to 3rd gear. I have changed the fluid and I had to put a little more than half a quart of fluid into it. The transmission is leaking fluid. One thing that I noticed was that the drain plug backed out. I don't know why this happened but it leaked around it. There is another small leak where the engine and transmission meet. This is a very small leak and it only leaks in freezing temperatures. The leak that has been happening where the engine and transmission meet has been happening for about 2 years now. I have brought the vehicle in to have someone take a look at it and they said that there was no leak. At 60-65k miles, the fluid is a solid glossy black color.

12/23/16, I purchased a 2012 Chevrolet Sonic. 4/6/17, I was at a traffic light when smoke come in the vents from the hood of the car. I called onstar & to run a diagnostic. The diagnostic didn't return any information & I contacted the dealer & took the vehicle for service on 4/9/17. I was told the thermostat housing was leaking and caused the smoking. The coolant system was flushed & filled & a gm oil, lube, filter change was done. The vehicle was ready for pick on 4/19/17. A few weeks later the car was smoking again. I called the dealer, I was told it was probably just fluid on the engine. The car continued to smoke periodically. 6/7/17, there was a large pool of oil under the car, I took the car to a local shop. They said that the oil had been overfilled & that it blew a seal. I called the dealer, I was told they did not overfill the oil & made another service appointment. I was told again there was a problem with the coolant system & the oil & that was the reason for the smoking. Repairs completed 7/10/17. 9/27/17, while driving the check engine light came on, so I called onstar for a diagnostic & they gave me an error code p0299. They told me that it was an airflow problem. I called the dealer & asked for the service manager & gave her the error code. She said there was a problem with the turbo & that I needed to bring the vehicle in. I took the car to them 10/3/17. 10/4/17, the service department called me & told me that the turbo on the car was bad. The repairs were completed on 10/12/17. 10/13/17 the car overheated. The vehicle was leaking coolant in two places. I took it to a different dealer & they said the t-joint in the coolant system was leaking. The repairs were completed on 10/18/17. 11/3/17 an email from on-star said there was an engine problem. I contacted on-star for a diagnostic & they said something is wrong with the coolant system.

June 2015 the dealer switched cars when we refused the options at the closing of the deal to a base/standard car. A week or so after purchasing the car a tire popped as we drove down the street. It is very loud in the morning. A high pitched squeaking sound. Next we have been smelling gas,oil/fluid leaking from the car. The driveway is stained from it. The thermostat has been changed 3 times. It has been jerking,stalking, sputtering. The antifreeze reservoir has boiled over several times. It smells like something electrical is burning. The air conditioner doesn't cool well. The windshield wipers tore up in less than a year. Thealership doesn't know why these things have happened they want to do maintenancing to see if that fixes it. Over $1000. We got this compact car to save and survive. This has been an expensive cheap car.

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