Preview: 2012 Jeep Wrangler
A Jeep’s power has always been expressed through its transmission – by clawing its way over obstacles that only a low-range transfer case could manage. However, powered by various in-line four-cylinders and V6s over the years, it often proved to be a bit anemic on pavement. But, for 2012, the all-new 3.6-litre Pentastar V6 changes that. This engine bumps up the base horsepower over the previous V6 by 40% – then adds 10% more torque and increases fuel economy by 15%. That’s a big jump.
This new powerplant also happens to come on the 70th anniversary of the iconic brand, which was first built in 1941 for the military. It did so well in battle that civilian versions followed, starting in 1945 with the CJ-2A. This light four-wheel-drive vehicle featured a tiny 2.2L four-cylinder, a manual T90A transmission, a Spicer 18 transfer case and a full-floating Dana 25 front and Dana 23-2 rear axle. With this setup, it could go almost anywhere – and that’s Jeep’s legacy.
For this introduction, Jeep has chosen to present the new Wrangler in the forests of Oregon, an area where one can still find examples of each generation of Jeep climb the logging roads of the mountains Tualatin. In fact, this region is home to reality, men Axe TV. Shot through the mountains, it shows the extreme slopes and muddy steep peaks on which the loggers work - exactly the type of terrain in a Jeep happily called home.
For 2012, the insertion of the Pentastar 3.6L base engine is the big news.Almost as important, however, is that the Wrangler also receives a new five-speed automatic (for the first time). Off-road, its lower ratio improves its first crawl mode, while the high end promotes better gas consumption. For purists, a six-speed manual is also available.
Making 285 horsepower and 260 lb.-ft. of torque, compact, all-aluminum V6 is more than 40 kg lighter than the previous cast-iron block 3.8L V6. Weight savings were also realized with accessories that can be attached directly to the block, while the exhaust manifolds were removed. Instead, exhaust flows through passages cast directly into the Pentastar’s cylinder head.
Low Gear Ratio Rear End - News
The capable driveline of the Sport and Sahara models includes a Dana 30 front axle and Dana 44 rear axle. The Command-Trac® NV241 part-time, two-speed transfer case features a 2.72:1 low-range gear ratio. The Rubicon model features heavy-duty Dana 44
Almost as important, however, is that the Wrangler also gets a new five-speed automatic transmission (for the first time). Off-road, its lower first gear ratio improves its crawl mode, while the high end promotes better gas mileage.
44 rear axle. The Command-Trac® NV241, part-time, two-speed transfer case, features a 2.72:1 low-range gear ratio. In addition, an optional Trac-Lok® limited-slip rear differential provides extra torque and grip in low-traction environments such as
To begin with, the transmission will be mated exclusively to the award-winning 3.6-liter V6 Pentastar engine that was introduced last year and on rear-wheel drive and all-wheel drive models of V6 Chrysler 300 and Dodge Charger. The lower gear spread of
The driveline of the Sport and Sahara models include a Dana 30 front axle and Dana 44 rear axle. The Command-Trac NV241, part-time, two-speed transfer case, features a 2.72:1 low-range gear ratio. In addition, an optional Trac-Lok limited-slip rear
Low Gear Ratio Rear End - Bookshelf
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