2007 Chevrolet Hhr Ls Wagon 4-door 2.2l 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.

Made in America | These cars top the most-American list

The car with the most American/Canadian content for 2022 is ... cue the drumroll ... the Lincoln Corsair, in both standard gasoline-fueled and plug-in hybrid guise. Both versions of Lincoln's compact luxury crossover earned a score of 86 — due to 72% of its parts coming from one of the two aforementioned countries — in the American University Kogod Business School's annual "Made in America Auto Index." Last year's leader, the 2021 Ford Mustang GT (when equipped with a manual transmission) fell all the way to 22nd place with a 50% rating due to a switch in transmissions sourced from Mexico. In case you're interested, that puts Ford's red-blooded American ponycar below vehicles like the Kia Sorento, Mercedes-Benz GLE-Class SUV and Lexus ES. If you're wondering how an American car that's assembled within the borders of the United States could rank below a model from a Korean, German or Japanese automaker, well, we'll let Kogod explain: "The components of the index are based on research performed by the Center for Automotive Research in Ann Arbor Michigan regarding the economic value of different components of auto manufacturing. For example, the highest ranked cars are made by U.S.-based manufacturers using American engines and transmissions, and with a high AALA percentage of U.S. and Canadian parts." There are 25 total vehicles listed in the Top 10 (there are lots of ties this year). Here's the full list: (1) Lincoln Corsair: 86 (1) Lincoln Corsair PHEV: 86 (2) Tesla Model 3 Long Range: 82.5 (3) Chevrolet Corvette Sting Ray: 81 (4) Chevrolet Colorado: 80.5 (5) Jeep Cherokee Latitude 4x4: 80 (5) Jeep Cherokee Trailhawk: 80 (5) Tesla Model 3 Performance: 80 (5) Tesla Model Y: 80 (6) Dodge Durango Citadel: 79.5 (6) Dodge Durango Blacktop AWD: 79.5 (7) Honda Passport Trailsport: 78.5 (8) Ford F-150 2.7L, 3.3L, 5.0L: 77.5 (8) Ford Ranger: 77.5 (8) Ford Bronco automatic: 77.5 (8) Tesla Model S: 77.5 (8) Tesla Model X: 77.5 (9) Jeep Grand Cherokee Laredo 3.6L: 77 (9) Jeep Grand Cherokee L LTD: 77 (9) Jeep Grand Cherokee Overland 3.6L: 77 (9) Chevrolet Camaro automatic: 77 (10) Honda Odyssey: 76 (10) Honda Ridgeline: 76 (10) Honda Pilot: 76 There's a whole long list of reasons for the above scores, with seven criteria that include factory location, headquarters location and where its various bits and pieces come from.

Sunday Drive: Trucks and SUVs of all shapes and sizes

The American automotive marketplace is dominated by trucks and SUVs, and so was the last week of coverage on Autoblog. By far, the most popular story of the week was our First Drive of the 2018 Lincoln Navigator. It may look like an old-school lumberer, but in reality Lincoln's flagship is a thoroughly modern, turbocharged-V6-powered, three-row, luxury people mover. The Jeep Wrangler is the world's most recognizable vehicle. So it's no surprise that the next version looks a whole heck of a lot like the last one, and the one before. It's all in the details, which is why we were so excited when Jeep decided to unleash a trio of images showing both two- and four-door Wranglers for us to dissect ahead of the SUV's official debut at the L.A. Auto Show later this year. Past that, spy photos of the next Chevy Silverado and Ram 1500 were predictably popular. See both of those below, and the cap it all off, check out the entire week's worth of SEMA coverage – including the bonkers Hennessey VelociRaptor 6x6 – in our mega image gallery at the bottom of this post. Enjoy! As always, tune in to Autoblog next week for a front-row seat to all the happenings worth following in the automotive industry. 2018 Lincoln Navigator First Drive | From black sheep to flagship 2018 Jeep Wrangler revealed: First photos released before L.A. Auto Show debut 2019 Chevy Silverado looks slim and clean beneath the camo 2019 Ram 1500 gets vertical touchscreen infotainment system 2017 SEMA Show Mega Photo Gallery Chevrolet Jeep Lincoln RAM Truck SUV recap sunday drive