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GM extends production cuts, affects Cadillacs, Camaro and Acadia

General Motors is extending production cuts at some of its North America factories due to a chip shortage that has roiled the global automotive industry, the U.S. carmaker said on Thursday. The move's impact has been baked into GM's prior forecast that the shortage could shave up to $2 billion off this year's profit. GM's Lansing Grand River assembly in Michigan will extend its downtime through the week of April 26. The plant makes Chevrolet Camaros and Cadillac CT4 and CT5 sedans. It has been out of action since March 15. GM's Spring Hill assembly in Tennessee will shut down for two weeks starting the week of April 12. The plant makes the Cadillac XT5, XT6 and GMC Acadia. The company said it has not taken downtime or reduced shifts at any of its more profitable full-size truck or full-size SUV plants due to the shortage. The news was first reported by CNBC. Reporting by Ankit Ajmera in Bengaluru; Editing by Maju Samuel and Sriraj Kalluvila

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.

2015 Chevrolet Cruze spied on its home turf

The next Chevrolet Cruze isn't set to go into production for about another year, and we're just now seeing prototypes of the new compact running around here in the States. Not much more has been revealed since we saw the car blasting through the snow in Europe, but we can still clearly see new design elements like the larger grille, slimmer headlamps and redesigned taillamps.
Our spy photographers worked up a composite image of this Cruze prototype alongside the current model, and here, we can clearly see some big visual changes are in store for the new model. The 2015 Cruze's hood slopes downward more dramatically, the windshield is more heavily raked, and the roofline looks more fluid overall. The next-generation Cruze will ride on the new global Delta platform that will also underpin other General Motors vehicles like the Chevrolet Volt and Equinox.
As for what's under the hood, we expect the normal range of gasoline four-cylinder engines (both naturally aspirated and turbocharged), and the compact's new turbodiesel four should carry over, as well. Have a look at the full brace of spy photos in the gallery above.