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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.

2023 Chevy Equinox price goes up a few hundred bucks

Chevrolet and GMC have uploaded the configurators for sibling crossovers the 2023 Chevy Equinox and 2023 GMC Terrain. Both get a few changes to improve performance, and new paints. GM jettisoned the turbocharged 1.5-liter gas engine making 170 horsepower and 203 pound-feet of torque in both vehicles. Replacing it is a different turbocharged 1.5-liter gas engine making 175 hp and 203 lb-ft. The Equinox sends its power through a six-speed transmission, the Terrain fits a nine-speed transmission. On the Equinox, fuel economy in standard front-wheel drive trims holds steady, but the AWD trims lose one mile per gallon in their city and combined EPA ratings. On the Terrain, FWD trims lose one mile per gallon across the board, the AWD trims lose one mile per gallon in the city only. Both models also upgrade to an electro-hydraulic brake system, leaving vacuum-assisted braking behind. The Equinox color palette drops Cherry Red Tintcoat, Seaglass Blue Metallic and Silver Ice Metallic for replaces with Harvest Bronze Metallic, Radiant Red Tintcoat, and Sterling Gray Metallic. Buyers who want the razzle dazzle of the Equinox's optional Blackout and Redline Edition Packages are out of luck at the moment, both appearance flourishes unavailable to order. The Terrain's paint menu drops Cayenne Red Tintcoat, Hunter Metallic, and Quicksilver Metallic for Deep Bronze Metallic, Sterling Metallic, and Volcanic Red Tintcoat. All-wheel drive can be added to any Equinox and Terrain trim for $1,600, save for the Terrain AT4 and Denali that come standard with AWD. Prices for the 2023 Chevy Equinox after the $1,395 destination charge, and their differences from 2022, are: Equinox LS: $27,995 ($300) Equinox LT: $29,095 ($300) Equinox RS: $32,095 ($100) Equinox Premier: $33,195 ($300) New pricing for the 2023 GMC Terrain can only be seen when you visit the configurator's Summary page. The initial Build & Price page shows MSRP before the $1,500 premium on every trim to that pays for the mandatory OnStar with Connected Services plan. After the $1,395 destination charge, the new prices are: Terrain SLE: $31,295 Terrain SLT: $35,295 Terrain AT4: $37,395 Terrain Denali: $39,995  

2021 BMW M3 and M4 vs all the high-powered sport sedans and coupes

Should you have a found a way to get past that schnoz, you've probably digested some of the basic specs for the all-new 2021 BMW M3 sedan and M4 coupe specs. They're plenty impressive. There's also, basically, two sets of them thanks to the regular and Competition versions that differ in engine output and transmission type.  But how do they compare to other ultra sport sedans and coupes? Well, we were wondering that too, so we fired up the Autoblog Comparison Spreadsheet Generator 5000 (aka me chained to my computer in a dark basement).  Sadly, there are surprisingly few competitors for the 2021 BMW M3. Rival sedans include the Mercedes-AMG C 63 and the Alfa Romeo Giulia Quadrifoglio, along with the Audi RS 5 Sportback sedan/coupe/hatchback thing. There's no more Lexus IS F, the Cadillac CT4 Blackwing has yet to arrive and Jaguar doesn't offer a spicy XE R.  Happily, there are more coupe rivals for the 2021 BMW M4, including the two-door versions of the AMG and Audi as well as the Lexus RC F. I also included the Ford Shelby GT350 and Chevrolet Camaro SS 1LE. On paper, they align incredibly well. On the street and on a track, I can personally attest that these Americans are fully capable of keeping up and/or bettering the fancy-pants luxury brands (and let's not forget there are even more powerful, hardcore versions available). If they don't align in terms of price or prestige, whatever. OK, let's get to the spreadsheet. Let's start with the coupes and note that I didn't bother listing the dimensions for the M4 Competition and C 63 S as they are identical to their "lesser" siblings.  I won't bother burning words explaining what you can see on the chart. Instead, I'll point out a few things that stood out to me. First, BMW M comes awfully close to matching the output of AMG's twin-turbo V8 despite having two fewer cylinders. Similarly, Audi manages to better the 0-60 time of the M4 Competition and tie the C 63 S despite being WAY down on power. It's not like it weighs less. Magic? Second, and speaking of 0-60 times, remember the importance that transmission and drivetrain make with them. It's not just horsepower and torque. An automatic will be quicker and easier to launch than a manual, while all-wheel drive provides more instantaneous and beneficial grip.