2006 Ford F-250 Super Duty King Ranch Crew Cab Pickup 4-door 6.0l on 2040-cars

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NHTSA closes probes on Jeep Grand Cherokee, Ford Freestar and Mercury Monterey

The Detroit News reports the National Highway Traffic Safety Administration has officially closed its investigations into 2012 Jeep Grand Cherokee, 2004-2005 Ford Freestar and Mercury Monterey models. The separate probes found no issues that pose safety concerns. NHTSA began investigating certain Grand Cherokee SUVs over complaints that power steering hoses could detach during operation, thereby increasing the risk of a vehicle fire. Of the 24 reports of failure, none alleged smoke or fire in the engine bay, and Chrysler has since modified the power steering cooler assembly to reduce the likelihood of the failure.
Meanwhile, certain Ford Freestar and Mercury Monterey vehicles garnered a government probe after receiving complaints that the models were equipped with faulty scissor jacks. The agency had received six reports of the jacks failing or causing injuries, including one incident that resulted in a fatality. But NHTSA says the jack failure rate is similar to those found in other vehicles. In those six cases, the government agency found the jacks were being used for something other than changing a tire, and investigators could not determine whether the emergency brake was set or the rear tires were properly chocked.

Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"

Next Ford Mustang to drop 400 pounds

The Ford Mustang is already the lightest of the current crop of muscle cars, at around 3,600 pounds for a GT coupe with the six-speed manual transmission. That's almost 260 pounds less than a Chevrolet Camaro SS and about 450 pounds less than a Dodge Challenger R/T, which means the Mustang has a pretty big advantage when it comes to handling, braking, accelerating and economy. More good news: The next Mustang will be even lighter.
According to a report from Edmunds, the sixth-generation Mustang, which is set to debut at the 2014 North American International Auto Show, will shed an additional 400 pounds of body fat. That 11-percent weight reduction will be thanks to lightweight materials, with a particular focus on using stronger, but less material in construction. Aluminum will feature heavily, but Edmunds' inside source warns that there is "nothing terribly exotic" coming to the original pony car.
The other big news is that the new Mustang will be smaller overall. It's going to be 15-inches shorter than the 188.5-inch Mustang on sale today, while it'll also be 6.5 inches narrower. Shorter overhangs, both in the front and rear, are also good signs for those that want an agile Mustang.