1984 Chevrolet Corvette Base Hatchback 2-door 5.7l on 2040-cars

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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.

Three automotive tech trends to watch in 2018 and beyond

Every year, technology plays a bigger and bigger role in the auto industry. To put things in perspective, 10 years ago iPod integration and Bluetooth were cutting-edge in-car innovations, and smartphones and apps weren't yet a thing since the first iPhone was only about six months old. And I can't recall anyone talking about autonomous cars. Compare that to today, with mainstream coverage of the auto industry dominated by autonomous technology, along with electrification and almost every move made by Tesla. These three topics were the most significant trends of car tech in 2017 and I believe they will continue to shape the auto industry in 2018 and beyond. Let's examine them. Full Autonomy Gets Closer to Reality While there were many developments this year that indicate we're inching closer to fully autonomous vehicles, I was behind the wheel for hours to witness one of them. In October I had the chance to test Cadillac Super Cruise on a 700-mile, 11-hour drive from Dallas to Santa Fe – and had my hands on the wheel for maybe 45 minutes max throughout the entire trip. Super Cruise is far from making the Cadillac CT6 or any GM vehicle fully autonomous, and has limitations such as functioning only on pre-mapped main highways. While it simply adds a layer of lane centering to adaptive cruise control, the technology will go a long way in making mainstream drivers more comfortable with letting machines take over. On a separate front, GM is pushing ahead with fully autonomous vehicles and announced last month that it plans to launch of fleets of self-driving robo-taxis in several urban areas in 2019. While most automakers are also in the race to make autonomous cars a reality, GM's turbocharging of its efforts appeared to be in response to Waymo, which announced just weeks earlier that its Early Rider Program in the Phoenix area would go completely driverless. The Early Rider Program launched last April, offering the public a chance to ride in Waymo's autonomous Chrysler Pacifica minivans. In this new phase of testing, Waymo is using its own employees as guinea pigs instead of the public while the vehicles operate without a human behind the wheel, and takes another giant step forward for fully autonomous driving.

2019 Nissan Leaf Plus vs. Chevy Bolt, Hyundai Kona Electric: How they compare on paper

Buying an EV once meant choosing either a reasonably priced model with paltry range and weak power, or a massively expensive one with a decent range. But today we have not one, but three options with reasonable prices and healthy ranges of over 200 miles. The latest of which is the 2019 Nissan Leaf Plus, which brings a bigger battery and a more powerful motor over its entry-level counterpart. The question is, how does it stack up with the defending entries in this segment, the 2019 Chevy Bolt EV and Hyundai Kona Electric? To get an idea, we've gathered up the specifications of each electric hatchback for comparison. We'll take a look at power, torque, electric range, charging options, interior space and the all-important pricing and incentives. You can see the raw numbers in the chart below, and additional insights in the text beyond that. If you'd like to compare these cars with other vehicles, be sure to check out our comparison tools. Range and power No matter how much electric cars improve their overall range, range anxiety is going to be an issue for a while, meaning every mile counts. The Kona Electric is the hands-down winner, managing 258 miles from its 64-kWh battery. Next is the Chevy Bolt EV at 238 miles from the group's smallest 60-kWh battery, followed by the Leaf Plus with 226 miles from a 62-kWh battery. For those who want to get really deep into energy usage, the Bolt EV and the Kona Electric have the same EPA rating for energy consumption of 28 kWh per 100 miles, meaning they're equally efficient. This is particularly impressive for the Kona, since it weighs nearly 300 pounds more than the Bolt. Something else to consider with these electric cars are charging options. All three have 120-volt level 1 and 240-volt level 2 charging capability standard, but only the Leaf Plus and Kona Electric give you DC fast charging capability for free. To get it on the Bolt EV, you'll spend an extra $750. Speaking from experience, you'll want DC fast charging if you plan on doing any long trips. 2019 Nissan LEAF e+ View 26 Photos As for the motors propelling these EVs, there's very little difference. The Bolt and Kona are neck-and-neck with 200 and 201 horsepower respectively. The Leaf has a few more horses at 216. In the torque department, the Leaf is last with 250 pound-feet, and the Bolt is just ahead at 266. The Kona is a serious twister with 290 pound-feet.