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'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).

These are the cars being discontinued for 2024 and beyond

While we get new and updated car models every year, its inevitable that we'll need to say goodbye to some nameplates as well. This time around, it feels like we have confirmation or reports of an unusually large number of vehicles being discontinued in 2024 and the coming years.  We shouldn't be surprised. A large number of automakers are approaching their various target dates for electrification of their fleets. As such, some beloved internal combustion cars are going away, sometimes with appropriate fanfare like special editions. Others are slinking away quietly, killed by slowing sales and changing consumer trends. Of course, the end of production doesn't necessarily mean permanent death. Some of these models could be resurrected in later years ... and probably as an EV. With that in mind, here are the vehicles that are being discontinued in 2024 and beyond.   Alfa Romeo Giulia Quadrifoglio and Stelvio Quadrifoglio Alfa Romeo ended the production of its combustion-only Quadrifoglio models in April 2024 as the Italian automaker moves toward an electrified future. This isn't the end of the Quadrifoglio entirely, though, with Larry Dominique, Alfa Romeo senior vice president and head of North America, writing, "I look forward to presenting the next chapter in the four-leaf clover’s journey."   Chevrolet Camaro GM is ending production of the Chevy Camaro after 2024, but is sending it off in style with a CollectorÂ’s Edition. WouldnÂ’t it be cool, though, if Chevy brought it back as an EV?   Chevrolet Malibu Rumors of its demise have been around for a while, but now itÂ’s official. GM will end production of the Chevy Malibu in November of 2024. The assembly line in Kansas will be retooled to build the replacement for the Chevy Bolt.   Dodge Durango The three-row Durango is slated to be replaced by the Stealth nameplate after 2024. The Durango name could make a comeback later, according to rumors, on a body-on frame SUV based on the Jeep WagoneerÂ’s platform.   Ford Edge This is the last year for the Edge in the U.S., with the final unit rolling off the assembly line in April. On sale since 2007, the Edge topped 100,000 sales in all but three full years of production.   Ford Escape Newly refreshed for the 2023 model year, FordÂ’s popular Escape compact SUV is reportedly taking its leave in 2025 in order to usher in — you guessed it — an EV in its place.

GM 8-speed transmission lawsuit granted class action certification

A story on Autoblog about potentially faulty 8-speed automatic transmissions from General Motors in 2019 has, as of the day this was published, 166 comments, mostly from owners of cars and trucks who say they are experiencing "a hesitation, followed by a significant shake, shudder, jerk, clunk, or 'hard shift' when the vehicle's automatic transmission changes gears." At the time, lawyers were seeking statewide classes in at least six states. As of today, the Detroit Free Press reports that a judge has granted class action status to a lawsuit brought by 39 plaintiffs across 26 states covering the transmission issue. The lawsuit specifically applies to vehicles that are equipped with GM's 8L90 or 8L45 8-speed automatic transmissions made between 2015 and March 1, 2019. Both of these transmissions are similar units, the 8L45 being slightly lighter version used in fewer vehicles than the beefier 8L90, and are designed for front-engine, rear- or all-wheel drive applications. The lawsuit alleges that the erratic transmission behavior makes some vehicles unsafe to drive. Ted Leopold, partner at Cohen Milstein and the court-appointed lead counsel for the case, said in a statement, "General Motors knowingly sold over 800,000 eight-speed transmission vehicles, which they knew to be defective for years, and yet made the business decision not to tell its customers before purchase." He added, "Dealers were directed to tell the customers that harsh shifts were ‘normal' or ‘characteristic.Â’ Such decision making is both highly irresponsible and emblematic of what GM believes it can get away with." The vehicles included in the court order with potentially faulty transmissions includes: 2015-2019 Chevrolet Silverado 2017-2019 Chevrolet Colorado 2015-2019 Chevrolet Corvette 2016-2019 Chevrolet Camaro 2015-2019 Cadillac Escalade and Escalade ESV 2016-2019 Cadillac ATS, ATS-V, CTS, CT6, and CTS-V 2015-2019 GMC Sierra, Yukon, Yukon XL, and Yukon Denali XL 2017-2019 GMC Canyon Some additional details of the lawsuit can be found at the Cohen Milstein site, including claims that "since 2015, GM has issued thirteen versions of a “technical service bulletin,” or “TSB,” related to this shifting issue alone." The statement from Cohen Milstein says that a "second action regarding GM vehicles with 8L transmissions is also underway in Battle v. General Motors, LLC, 2:22-cv-108783.