2014 Jeep Wrangler Unlimited Rubicon on 2040-cars

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EPA suspected Fiat Chrysler of using 'defeat device' in 2015

U.S. regulators told Fiat Chrysler Automobiles in November 2015 that they suspected some of the automaker's vehicles were equipped with secret software allowing them to violate emission control standards, according to emails disclosed on Friday. The U.S. Environmental Protection Agency and California Air Resources Board accused Fiat Chrysler in January of using the software, known as a "defeat device," to illegally allow excess diesel emissions in 104,000 Jeep Grand Cherokees and Dodge Ram 1500 trucks built between 2014 and 2016. Byron Bunker, director of the EPA's Transportation and Air Quality compliance division, said in a January 2016 email to Fiat Chrysler, obtained by Reuters under the Freedom of Information Act, that he was "very concerned about the unacceptably slow pace" of the automaker's efforts to explain high nitrogen oxide emissions from some of its vehicles. Nitrogen oxide is linked to smog formation and respiratory problems. Bunker's email said the EPA had told Fiat Chrysler officials at a November 2015 meeting that at least one auxiliary emissions control device on the car maker's vehicles appeared to violate the agency's regulations. Mike Dahl, head of vehicle safety and regulatory compliance for Fiat Chrysler's U.S. unit, responded in a separate email that the company was working diligently and understood the EPA's concerns. He added that if the EPA identified Fiat Chrysler vehicles as containing defeat devices it would result in "potentially significant regulatory and commercial consequences." The documents redacted the vehicles named, but two officials briefed on the matter said they referred to diesel models. The EPA's November 2015 meeting with Fiat Chrysler came two months after Volkswagen AG, mired in a major tailpipe emissions scandal, admitted to installing secret defeat device software in hundreds of thousands of U.S. diesel cars to make them appear cleaner than they were on the road.

The Jeep Grand Cherokee Trackhawk is the all-wheel-drive Hellcat you've been waiting for

If the Jeep Grand Cherokee SRT was the venerable SUV cranked to 10, the new Trackhawk goes to 11. Actually, make that 707, because the Grand Cherokee Trackhawk is a Hellcat by another name. Under the hood is the same 707-horsepower supercharged V8 from the sinister corporate cousins Charger and Challenger. The torque rating drops just a bit to 645 pound feet, versus the 650 of the Hellcats, but we don't think many people will be too upset. Especially since Jeep claims the Trackhawk is capable of a 3.5-second 0-60 mph run and a quarter-mile time of 11.6 seconds. The former is right in line with the Challenger Hellcat. View 24 Photos The Grand Cherokee Trackhawk also offers a unique difference to the Hellcats, and its not the SUV body style. The Trackhawk is all-wheel-drive. Power goes from the supercharged V8 to an 8-speed automatic and a single-speed transfer case. There's also an electronic limited slip differential at the back. Jeep beefed up the transfer case with a wider chain that features forged sprockets. The rear drive shaft and half shafts have been strengthened to handle the extra power. Power is split 40/60 front and rear in the default automatic setting, and becomes more rear biased in more aggressive driving modes. In the sportiest "Track" mode, power is split 30/70. In the least aggressive "Snow" mode, power is split 50/50. The sportier drive modes also firm up suspension and decreases shift times. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Helping manage all the power is a high-performance suspension with adaptive Bilstein shocks. The suspension lowers the SUV a full inch compared with normal Grand Cherokees. Wheels are 20 inches in diameter and 10 inches wide wrapped in 295-millimeter wide tires, either all-seasons or optional three-seasons. An optional forged set of wheels is available, too, which Jeep says will save 12 pounds of weight. The wheels are stopped by Brembo six-piston calipers and 15.75-inch rotors up front, and four-piston calipers and 13.73-inch rotors out back. Jeep says the front brakes are the largest ever fitted to one of its vehicles. Visually, you'll be hard-pressed to tell a Grand Cherokee Trackhawk from the current SRT variant. The bumpers and fender flares are roughly the same. But a tell-tale sign is the lack of fog lights.

Jeep Wrangler JK's exit interview: brilliant, flaws and all

The engineers at Fiat Chrysler Automobiles, Jeep's current steward (and there have been many), have to be sweating bullets as they ready the forthcoming, long-overdue replacement for the Wrangler. It's the brand's icon, its most recognizable vehicle, and the reason Jeep enjoys such success today. Most brands use their flagships to lure shoppers who will then take home a more practical, pedestrian model. Think about the relationship between Corvettes and Malibus in the Chevy showroom. For Jeep, however, the Wrangler is a business unto itself: Nearly one in four Jeeps sold new last year was a Wrangler. That's a lot of pressure as Jeep gears up to replace the current model, codenamed JK, which has been on the road since 2007. I took a Wrangler into the woods to ponder it all. The Wrangler lineup starts around $26,000 but climbs rapidly from there. At the upper end of the spectrum sits the Rubicon Hard Rock, which builds on the already capable Rubicon's locking differentials and electronic front sway bar disconnect with a host of styling goodies. At $43,325 as tested, the Hard Rock is no cheap trail toy. Wranglers have gotten more comfortable and capable over the years, but driving one is still an exercise in compromises. Luxury here means durable leather upholstery and a lot of bass from the stereo. The driving experience is of the "well, it's better than it used to be" variety on pavement. The rational buy in this segment is the Toyota 4Runner Trail, which goes off-road almost as well as the Jeep and does everything else way better. But nobody takes home a Wrangler because it makes sense. It's a middle finger extended in the direction of conformity while fording the river of beige Corollas between home and office. You don't need a Wrangler, but you probably want one. That's why Jeep sold more than twice as many Wranglers as Toyota did 4Runners last year – and the 4Runner sells well. Wrangler sales aren't slipping, but increasingly stringent emissions and safety standards are signs of the inevitable forward march of progress – and so Wrangler must change with the times. Simple ways to improve the Wrangler are obvious: An updated interior with a modern infotainment system, user-selectable traction control modes tailored to specific terrain conditions, an eight-speed automatic, better aerodynamics, and a lot of weight-saving aluminum are inevitable.