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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.

2016 Chevy Volt powertrain video teasers

If there's one thing we've learned about plug-in vehicle fans, you have a thing for seeing your cars get made. The series of videos showing BMW i3 production was strangely popular, as were the shots from inside the VW e-Golf plant. Well, with General Motors pulling the veil off of the 2016 Chevy Volt this week, it's time to take a peek at the production process for that vehicle as well. You're welcome. Up first we've got a clip from CNN Money showing a little bit about how the new Volt's new battery pack and other powertrain components are made. Those of you who are trying to read the lithium tea leaves and see if the new shape reveals that the 2016 Volt will have five seats might want to check it out. Then we've got two clips from GM itself, one showing an animation about the updated Voltec powertrain and another with some B Roll of the old Volt. Since GM doesn't want us to see the new car quite yet, we'll have to enjoy this for now. Watch below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

2016 Chevy Volt rated at 106 MPGe, 53 miles of pure EV range

Following a string of rumors, Chevrolet and the Environmental Protection Agency have released official fuel economy numbers for the second-generation Volt. As was reported earlier today, the new and improved hybrid will cover 53 miles on pure electric power. As Chevy tells it, first-gen Volt owners cover about 80 percent of their mileage on EV power alone, so the 40-percent increase from the second-gen should lead to an even bigger reduction in gas-powered Volt mileage. Chevy expects some 90 percent of mileage to come from a plug with its new 2016 model. This newfound EV range comes thanks to the 2016 Volt's 18.4-kilowatt hour lithium-ion battery. Rated at 106 MPGe by the feds – exactly what was promised by a June leak – the 2016 Volt improves nicely on the current model's 17.1-kWh, 98-MPGe battery back. There's also a marked improvement when relying on the gas-powered on-board generator. The 1.5-liter, four-cylinder engine will happily run on regular fuel and return a still-impressive 42 miles per gallon combined rating once the battery's state of charge is depleted. Expect the freeway to cruise to be even better, although Chevy isn't ready to say by how much. Fully charged and with a full tank, drivers should expect to cover 420 miles, a 40-mile improvement over the current model. Scroll down for the official press release from Chevrolet Related Video: The Results Are In: More Range for the 2016 Volt EPA-estimated pure electric range is 53 miles DETROIT – The 2016 Volt is engineered to offer customers more of what they want: range, range and more range. The Volt's all-new second-generation Voltec extended range electric propulsion system delivers 53 miles of pure EV range, based on EPA testing. That is nearly a 40-percent improvement over the first generation Volt. Chevrolet expects many next-generation Volt owners will use power solely from their battery for more than 90 percent of trips. Today, Volt owners use battery power on 80 percent of their trips. This means that the average Volt owner may expect to travel well over 1,000 miles between gas fill ups, if they charge regularly. For the first 53 miles, the Volt can drive gas and tailpipe-emissions free using a full charge of electricity stored in its new 18.4-kWh lithium-ion battery, which is rated at a combined 106 MPGe, or gasoline equivalent. When the Volt's battery runs low, a gas-powered generator seamlessly operates to extend the driving range for a total of 420 miles on a full tank.