2019 Chevrolet Corvette Z06 on 2040-cars

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Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

GM recalls 638,000 U.S. SUVs, trucks for unintended braking

WASHINGTON — General Motors is recalling 638,000 U.S. sport utility vehicles and pickup trucks because a wheel-speed sensor could fail and cause unintended braking, it said Thursday. The recall covers 2015-2020 Chevrolet Suburban, Tahoe, and Yukon and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. The sensor failure could result in unintended activation of the driveline protection system, and cause unintended braking of the wheel on the opposite side of the failed sensor. That could cause the vehicle to pull to one side unexpectedly, increasing the risk of a crash, the Detroit automaker said. GM said it was not aware of any crashes relating to the issue but found 150 field claims alleging the condition caused unintended braking or lateral vehicle motion. A GM dealer in May submitted a warranty report relating to the issue in a 2018 GMC Yukon, and two days later, a GM brand quality manager submitted the report to GMÂ’s Speak Up For Safety program that tracks potential safety issues, which prompted a GM investigation and testing. Recalls Chevrolet GM GMC Truck SUV

Chevy Silverado Midnight Edition coming to Chicago

Between the GMC Canyon Nightfall Edition and Chevy Silverado Custom Sport, the truck divisions of General Motors had no lack of blacked-out custom pickups to showcase at the Detroit Auto Show this year. But now the General has announced one more. Called the Midnight Edition, for this special Silverado blacks out all the trim, including the grille, bumpers, headlamp bezels, tow hooks, fog lamps, side and beltline moldings, 19-inch wheels, bedliner and bowtie emblems. It's based on the Silverado 1500 with the Z71 package, so it also boasts an off-road suspension, locking rear differential, hill-descent control and trailering pack. While it was at it, Chevy has also thrown in rear park assist and power heated door mirrors. Buyers will be able to choose between double- or crew-cab models, but no more than 5,000 examples will be produced this year, each priced at a premium pegged between $1,595 and $1,995 (depending on the model). The Silverado Midnight edition debuts today at the National Automobile Dealers Association convention in San Francisco and will be showcased at the Chicago Auto Show next month, around the time that deliveries will commence. 2015 Silverado Midnight Edition is The New Black Monochrome appearance package to debut at NADA and Chicago Auto Show 2015-01-22 DETROIT – Truck fans know that nothing adds presence to a pickup like basic black. And Chevrolet is taking black to the next level with the Silverado Midnight special edition, on display starting today at the National Automobile Dealers Association Convention & Expo in San Francisco, and making its public debut February 14 at the Chicago Auto Show. Beginning with a black Silverado Z71, the Midnight special edition adds: - An all-black front end with body-colored grille, bumper, headlamp bezels, tow hooks and fog lamps; - Black side moldings and beltline moldings; - 18-inch black painted alloy wheels with Goodyear Wrangler Duratrac all-terrain tires; - Special Z71 badges on the doors; - A spray-in bedliner (black, of course); - And the finishing touches – black Chevrolet bowties front and rear. Like all 2015 Silverado 1500 Z71s, Midnight special editions include off-road suspension, a locking rear differential, Hill Descent Control and a trailering package. Midnight special editions also include rear park assist and heated, power-adjusted outside rear-view mirrors.