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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.

NHTSA ends GM steering investigation without seeking a recall

DETROIT — U.S. safety regulators have closed an investigation into sticky power steering on thousands of older General Motors SUVs and will not seek a recall. The National Highway Traffic Safety Administration says GM in 2014 issued “special coverage” to fix the problem on the Chevrolet Equinox, GMC Terrain and other models. The coverage replaced a steering gear with an improved one. The agency said a recall isn't needed because of the coverage and low complaint and warranty repair rates. The agency opened the probe in June of 2020 into steering problems affecting an estimated 781,000 of the SUVs from the 2010 through 2012 model years. Increased friction could make it feel like the steering wheel is stuck. But GM said the SUVs could still be turned, although with more effort than usual. “In view of the special coverage, low rate of failure and low potential hazard to drivers, this preliminary evaluation is closed,” the agency wrote in documents posted Wednesday on its website. Government/Legal Recalls Chevrolet GMC Safety

GMC Hummer EV hits Neiman Marcus Christmas catalog for twice the price

This winter season, Nieman Marcus is getting into the true meaning of Christmas by offering a bunch of seriously expensive stuff in its annual holiday catalog. There's usually at least one automotive offering, and this year it's a 2022 GMC Hummer EV Edition 1 for an eye-watering $285,000. That's $172,405 more than the regular Edition 1 crab-walker, which is priced by GMC at $112,595. And what does one get for more than 2.5 times the cost of the most expensive electric Hummer? Well, hold your 1,000 horses, because this isn't just any Hummer EV Edition 1. No, it's a one-off Barrett-Jackson Hummer EV Edition 1. The interior of this Barrett-Jackson edition Hummer has been "curated" by Craig Jackson himself. And by curated, they mean it has a bunch of red trim everywhere and is garnished with a Neiman Marcus logo. Aside from that, there is nothing appreciably different about it. No performance upgrades, no special paint job. You do get an electric charging station at home, though, which might be the most useful addition to this whole enterprise. If that's not worth the price of an entire 1.5 extra Hummers to you, there's more. You get two VIP passes for the opening gala of the Barrett-Jackson auctions in exotic Scottsdale, Ariz. During the auction, you'll get access for two to Carolyn and Craig Jackson's personal skybox from where you can watch 1,500 cars trade hands. But don't get too comfy, because at some point you'll be invited on stage to receive your Hummer EV in front of a gaggle of inebriated fishing boat dealership owners. Oh, and you'll also get to bang the little auction hammer. You can pair the Hummer with other gifts in Nieman Marcus' "fantasy" catalog, like a $6.1 million dollar diamond ring. However, if you go with the $395,000 Great Gatsby-style roaring '20s party, make sure it doesn't end with the 9,000-pound Hummer Daisy Buchanan-ing any bystanders. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.