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GM opens official investigation into C8 Corvette transmission leaks

In March 2020, a month after Chevrolet began customer deliveries of the 2020 C8 Corvette, a GM dealer technician created a Reddit thread about a leaking gearbox in a Corvette with 32 miles. That car hadn't even been sold yet. Since then, as a search of "C8 Corvette transmission leak" shows, it's been tales of woe for some owners. Something in the Tremec TR-9080 transaxle in the back of the mid-engined Corvette doesn't work as it should, the fault able to cause codes that the transmission needs service, or that the driver needs to shift to park. In some cases, the battery would die because of follow-on issues after the initial transmission code, that code preventing the car from powering down. As Autoevolution reports, GM filed paperwork with the National Highway Traffic Safety Administration in August to look into what's going on. Between forum threads and GM's investigation document, there are several issues mentioned. The most common appears to be the dual-clutch transmission leaking fluid due to gasket failures like the one suffered by one owner at 858 miles, and another for an owner currently enduring a second leaking transmission. The Midengined Corvette Forum reported that Chevy engineers redesigned the TR-9080 pan, fitting Corvettes with the new unit at some point in the 2021 model year. The original pan was stamped steel unit affixed to the engine with two studs and 13 bolts, plus "reinforcement plates." The updated pan is said to be a cast aluminum unit affixed with two studs and 17 bolts, omits the reinforcement plates, and gets a new machined new groove around its edge to seat the gasket seal. The GM paperwork now at the NHTSA mentions a P1789 code, and says one reason for it could be "debris on the park position sensor magnet causing an incorrect position reading to the TCM." This might be caused by another issue mentioned in forums, which is clogged transmission filters. GM gives instructions for returning transmission filters to the company, and a poster on one forum said the Corvette tech at the dealer where he bought his Corvette told him the automaker "requires every used transmission filter to be returned to GM."  Whatever's going on, the problems haven't stopped, and they go beyond the P1789 code. Over the weekend, a 2022 Corvette owner posted on Corvette Forums that he got a check engine light on his car after just 850 miles.

GM laying off 500 workers to slow Chevy Sonic production

Due to slow sales of the Chevrolet Sonic and Buick Verano, General Motors is cutting a shift at the Orion Township plant that builds the pair. The move lays off about 500 workers, but most of them are expected to get offers to transfer to other factories, Automotive News reports. The move came just a day after GM announced adding 1,200 employees to the Detroit-Hamtramck plant. GM has been trying all year at the Orion Township factory to align production of the Sonic and Verano with their demand. The automaker first attempted idling the plant several times and eventually resorted to laying off about 100 workers. It also reduced the production rate there. With the huge rise in popularity of crossovers, demand for the plant's small cars is on the downturn. According to Automotive News, there's currently a 116-day supply of Sonics and 100 days of Veranos to sell. Delivers tell a similar tale because the Chevy is off 35.2 percent from January to September, and the Buick does little better with a 27.2 percent drop from the same period last year. While the situation at Orion Township might look rough now, big things are on the horizon. Soon, the new Chevy Bolt electric vehicle will be built there when it hits the market around 2017. Plus, the plant will also get a $245-million upgrade and 300 new jobs for another, unannounced vehicle.

Recharge Wrap-up: Free chargers for Canadian ELR buyers, Renovo gets funding for EV supercar

Chevrolet offers versions of its Express passenger van with B20 biodiesel and E85 capability. Customers can buy the van with the Duramax turbodiesel V8, which is compatible with the 20-percent biodiesel blend. There is also a FlexFuel V8, which can use the 85-percent ethanol gasoline blend. It's a great option for shuttling the whole soccer team to practice using renewable fuels. Read more at Domestic Fuels. Early buyers of the Cadillac ELR in Canada will get a 240-volt charger installed at their home for free. It should help convince some buyers to adopt the range extended luxury EV. Cadillac's Chief Marketing Officer Uwe Ellinghaus says, "Professional installation of the fastest home-charging unit is a natural way to mark the introduction of ELR to the luxury market." Read more in the press release below. Renovo has received venture capital funding from California-based True Ventures to build its Coupe electric supercar. The impressive EV, with its 500 horsepower and 1,000 pound-feet of torque, is an inspiring vehicle built by a promising company, according to its financial backers. Toni Schneider of True Ventures says that Renovo has "created incredibly advanced technology and a beautiful machine that is well positioned to disrupt the automotive market." Read more in the press release below. Renault says it will build its Fluence ZE electric car in China for an unnamed brand, pending government approval. Chief Executive Carlos Ghosn announced the plan at a test drive event in France on Monday. Renault has a partnership with Dongfeng Motors to build and sell its cars in China. Read more at Reuters. Germany has lifted its ban on Uber. While the German court believes the ride-hailing service is operating illegally without proper licensing for drivers, it says Taxi Deutschland waited too long to file the case against Uber. The taxi association plans to appeal the decision soon. See more in the video below, and read more at The New York Times. A new report from UC Davis claims that a global expansion of public transit could save 1,700 megatons of carbon dioxide yearly and over $100 trillion by 2050. A "high-shift scenario" would be necessary, wherein governments invest in rail and clean buses, expand biking and walking infrastructure and shift focus away from projects that encourage car use. This shift to public transit would especially be important in the US, China and India. Read more in the press release below.