2000 Jeep Wrangler Sport Sport Utility 2-door 4.0l on 2040-cars

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Watch this 650-hp Hennessey Jeep Grand Cherokee go from 0-60 in 3.9 seconds

Hennessey Performance Engineering has created an HPE650 package for the Jeep Grand Cherokee SRT fitted with the 6.4-liter Hemi engine. When it leaves the showroom floor it has 470 horsepower and gets from 0-60 miles per hour in 4.8 seconds. When it leaves Hennessey's garage floor after the upgrade it has 650 horsepower - 530 hp at the wheels, according to Hennessey - and gets to 60 mph in 3.9 seconds on its way to running the quarter-mile in 12.6 seconds.
There's more than just a Roots-type supercharger bolt-on, with ported cylinder heads and high-flow headers among the many changes made to the engine. You can watch this pre-2014 facelift silver model prove its spec sheet on the drag strip in the video below.

2014 Jeep Grand Cherokee probed by NHTSA for brake problems

Remember how Toyota got in all kinds of trouble over unintended acceleration? Well, the National Highway Traffic Safety Administration is investigating Jeep over unintended braking. NHTSA has announced a probe of 20,000 Grand Cherokee SUVs from model year 2014. Nine complaints have been received, with owners alleging that their Jeeps have issued brake warnings or gone ahead and applied the brakes when no threat was presented. Each complaint alleges that the vehicles have exhibited this behavior repeatedly, leading to a "sudden reduction in vehicle speed in traffic." So basically, a system designed to prevent accidents could actually increase the odds of a collision happening. Speaking to the Associated Press, Jeep spokesperson Eric Mayne said owners whose vehicles are exhibiting this behavior should report to dealers, while adding that the automatic braking/adaptive cruise control systems can be deactivated. Related Video: Scroll down for the official bulletin on the investigation from NHTSA. Date Investigation Opened: JUN 01, 2015 Date Investigation Closed: Open NHTSA Action Number: PE15021 Component(s): FORWARD COLLISION AVOIDANCE Manufacturer: Chrysler (FCA US LLC) SUMMARY: The Office of Defects Investigation (ODI) has received nine complaints alleging inappropriate activations of the autonomous braking system in model year (MY) 2014 Jeep Grand Cherokee vehicles. All nine reports alleged unexpected braking incidents preceded by collision imminent brake warnings and resulting in sudden reduction in vehicle speed in traffic. Two complaints reported autonomous braking incidents with no objects on the road resulting in rapid increase in brake force and anti-lock braking system (ABS) activations. The complaints alleged experiencing multiple events at different locations and road conditions. A Preliminary Evaluation has been opened to assess the frequency, scope and consequences of the alleged defect. The following VOQ numbers are associated with the issues discussed in this resume: 10543837, 10713629, 10690650, 10663320, 10630362, 10596913, 10533622, 10533524, 10651269.

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.