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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 Camaro takes a walk on the wild side at SEMA

From highly modified restomods to tuned pickups, Chevrolet has over 20 custom vehicles at this year's SEMA Show. Given the popularity of the Camaro in the aftermarket, it's no surprise that the new, sixth-generation model gets in on that act with four modified examples. Thanks to a combination of concept parts and components on the way in early 2016, Chevy gives future owners an idea of what's possible for their new coupe. Among the group are two takes on the SS trim at opposite ends of the color spectrum. The Chevrolet Performance version is Summit White with red accents, and it uses a lowered suspension to hunker the body over conceptual 20-inch wheels. Alternatively, the Camaro Black wears darkened trim, tinted glass, and matching 20-inch wheels. Chevy beefs up their performance to fit the added style by equipping both customs with exhaust, air intake, and brake upgrades. By far the weirdest among Chevy's group of modded Camaros is the Krypton concept in a custom shade of eye-popping green. This wild paint is electroluminescent, and when the system is activated, illuminated bowties appear across the body. Headlights with matching trim and painted exhaust tips finish off this alien aesthetic. Finally, the Camaro Hyper concept is for those looking for just a little added style for their coupe. Based on the LT trim with the 3.6-liter V6, it features Hyper Blue Metallic paint with white stripes and rides on 20-inch wheels. For a little added performance, coupe uses Chevy's aftermarket exhaust and a lowered suspension. Related Video: Gen Six Camaro Concepts Shine at SEMA Show Customized quartet demonstrate personalization and performance possibilities LAS VEGAS – With the all-new 2016 Camaro rolling soon into dealerships across the country, Chevrolet introduced four customized concepts at the SEMA Show today – each demonstrating the personalization possibilities enabled by a new lineup of accessories and performance parts.

Submit your questions for Autoblog Podcast #316 LIVE!

We record Autoblog Podcast #316 tonight, and you can drop us your questions and comments regarding the rest of the week's news via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
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2013 Detroit Auto Show