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Two More Recalls Push GM Total To 4.8 Million In A Month

General Motors announced two more recalls late Friday, bringing to 4.8 million the number of cars, trucks and SUVs the automaker has called back for repairs in the past month. The string of recalls, topped by an ignition switch problem in compact cars now linked to 13 crash deaths, has embarrassed the company and sidetracked its new CEO, who started work just over two months ago. GM has admitted knowing about the switch problem a decade ago, yet it didn't recall any cars until February. The recall delay has brought two congressional investigations and probes by the Justice Department and the National Highway Traffic Safety Administration. Late Friday night, GM announced it would recall 490,000 late-model pickup trucks and SUVs because transmission oil cooling lines weren't secured properly in their fittings. Transmission oil can leak from a fitting and hit hot surfaces, causing fires, the company said in a statement. GM said it knows of three fires and no injuries. The recall affects Chevrolet Silverado and GMC Sierra 1500 pickup trucks from the 2014 model year, as well as 2015 Chevrolet Suburban and Tahoe SUVs and the GMC Yukon and Yukon XL SUVs. All have six-speed automatic transmissions. The Silverado is GM's top-selling vehicle and an important profit center for the company. The GMC Sierra also is among GM's top sellers. Dealers will inspect the transmission oil cooling line fittings and make sure they're securely seated, at no cost to owners. Also Friday night, GM announced the recall of 172,000 Chevrolet Cruze compact cars because the right front axle shaft can fracture and separate while being driven. The recall affects cars from the 2013 and 2014 model years equipped with 1.4-liter turbocharged four-cylinder gasoline engines. If a shaft fractures, the wheels would lose power without warning and the cars would coast to a stop. GM says it has warranty reports of several dozen shaft fractures. It is not aware of any crashes or injuries. Dealers will replace the shafts free of charge. The recall allows dealers to resume selling affected Cruzes. GM issued a stop sale order on the cars Thursday night. The recall also covers about 2,500 replacement shafts used to fix manual transmission Cruzes that were recalled last September. In all, GM has recalled 4.8 million vehicles since last month, two million more than the company sold last year in the U.S.

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.

EV tax credits: Here's every electric car or plug-in hybrid that qualifies

Starting on April 18, the Internal Revenue Service released new guidance for U.S. buyers shopping for a new electric or plug-in hybrid vehicle. On April 18th, the IRS showed only six fully electric vehicles on the qualified list, but a day later Volkswagen confirmed its U.S.-built ID.4 also qualifies. That means right now, seven fully electric vehicles qualify for the full $7,500 EV tax credit, with three more from Chevrolet coming for the 2024 model year (we would expect these 2024 models to roll out slowly and be difficult to find for at least the first few months they are on the market). In addition to those seven fully electric cars, two plug-in hybrids also qualify for the full $7,500 credit. To qualify, a vehicle must be assembled in North America and must meet a strict set of guidelines that cover where battery materials were sourced. If any battery materials come from certain countries (importantly including China), the vehicle's tax credit is automatically cut in half. Further, according to the IRS, the vehicle's manufacturer suggested retail price (MSRP) can't exceed $80,000 for vans, sport utility vehicles and pickup trucks or $55,000 for any other type of vehicle (basically meaning sedans). Electric vehicles that qualify for the full $7,500 EV tax credit: Cadillac Lyriq (2023-2024) Chevrolet Blazer EV (2024) Chevrolet Bolt EV (2023-2024) Chevrolet Bolt EUV (2023-2024) Chevrolet Equinox (2024) Chevrolet Silverado (2024) Ford F-150 Lightning — all models (2022-2023) Tesla Model 3 Performance (2022-2023) Tesla Model Y — all models (2022-2023) Volkswagen ID.4 — U.S.-built models (2022-2023) Plug-in hybrid cars that qualify for the full $7,500 EV tax credit: Chrysler Pacifica PHEV (2022-2023) Lincoln Aviator Grand Touring (2022-2023) A smaller credit is offered on fully electric cars and plug-in hybrids that are assembled in North America but have batteries with materials sourced from unqualified countries (mostly China).