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The List: Best of proving grounds

Proving grounds are where automakers and enthusiasts alike go to push their vehicles to their mechanical limits. The Rubicon Trail, located in the Sierra Nevada, is the ultimate off-road test, while Germany's Nurburgring is a grueling 13 mile road and track course. Jessi and Patrick visit both iconic proving grounds in this "best of" compilation of The List. If you like what you see, stay tuned to watch the full episodes, or click here to go directly to our episode archive and pick out some of your own favorite moments of The List to revisit. The List #0004: Conquer the Rubicon Trail The List #0073: Drive the Nurburgring Have an RSS feed? Click here to add The List. Click here to subscribe to The List in iTunes. Click here to learn more about our hosts, Jessi and Patrick. BMW Jeep Off-Road Vehicles Racing Vehicles The List Videos Original Video

Jeep idles second shift it hired a month ago for 2014 Cherokee

In an unusual move, Chrysler is idling its recently hired second shift of 2014 Jeep Cherokee builders because, Chrysler spokeswoman Jodi Tinson said in a statement, it already has built the "critical number of vehicles we need to stock dealerships once containment is released," Automotive News reports.
After the "critical" 9,430 Cherokees were built, the layoff was enacted so as not to strain the automaker's logistics partners before the Cherokee is actually released. Chrysler says the temporary layoff will last about two weeks, with 500 workers out of work and another 600 reassigned at the Toledo Assembly Complex where the sports utility vehicle was being built. The second-shift workers were hired on August 19.
Chrysler previously insisted that it would release the Cherokee to dealerships by the end of the third quarter, and it initially planned to start selling the SUVs in mid-August. Apparently the Cherokee needed a software fix before hitting showrooms, which is how Chrysler explains why the release schedule is out of whack. We're thinking that this software fix addresses the "powertrain calibration" issue that delayed the first media test drives of the model. According to the Toledo Blade, Chrysler has admitted it is doing "extended quality validation testing" but refused to provide more information.

FCA's Pentastar V6 gets more power, efficiency for 2016

Already a vital member of FCA's powertrain lineup, the 3.6-liter Pentastar V6 is receiving major efficiency improvements for 2016. Thanks to a massive amount of new tech attached to the mill, fuel economy is up six percent, and torque below 3,000 rpm jumps nearly 15 percent. The updates arrive first in the 2016 Jeep Grand Cherokee, but they should proliferate to other models eventually. At least in the Grand Cherokee, the tweaks push power up five horsepower to 295 ponies. FCA's engineers went through the Pentastar from top to bottom to eke out as much efficiency as possible. For example, there's now a two-speed variable-valve lift system that can run in low- or high-lift modes. This upgrade is responsible for 2.7-percent better economy, the company claims. A new intake manifold with longer runners and updated variable-valve times also helps boost the torque output. Further improvements come from pushing the compression ratio to 11.3:1, from 10.2:1 before. Perhaps most impressive is that despite all of the innovations, the latest Pentastar actually weighs four pounds less than the current version. Beyond the Pentastar improvements, all of the FCA US gasoline engines, except for the Viper's 8.4-liter V10, will be E15-compatible for 2016. The company says that it wants to be ready for the higher ethanol content fuel's greater use in the near future.