1991 Jeep Wrangler Renegade Sport Utility 2-door 4.0l on 2040-cars

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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.

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.

Inline-6 Hemi replacement on the cusp of production from Stellantis

It appears that Stellantis is ready to put its long-rumored inline-six into production at its Saltillo, Mexico plant, possibly marking the beginning of the end of Chrysler's long-running 5.7L Hemi V8. But so far, the automaker's American brands have remained mum on where exactly the new turbocharged "Tornado" I6 may land. Stellantis powertrain blog Stellpower (by way of Muscle Cars & Trucks) spotted an entry for a new "GME T6" inline-six engine on the Saltillo facility's web site, suggesting that it was either in production or close to it. That entry has since been removed, but the mystery remains.  We've been hearing tidbits here and there about this new inline engine for years, but this is the first time we've seen anything suggesting its arrival is imminent. Usually, such a significant powertrain update would coincide with the launch of a new product to showcase it. So far, Stellantis has remained mum, even overseas, about where this engine is destined to reside. 2022 model year vehicles are likely off the table entirely.  But while it's common for new engines to debut with new cars and trucks, it's not a universal truth. Ford's Coyote V8 missed the corresponding Mustang refresh by a year, for example, orphaning the 2010 model and its much-needed styling updates with the old 4.6L V8 (and the 3.8L V6, for that matter; the 3.7L Duratec was also late to that party). Even sticking just to Stellantis, the JL Wrangler's powertrains have been a work in progress since it arrived back in 2018. The standard V6 and 2.0-liter turbo-4 debuted at launch; the EcoDiesel, 392 and 4xe all came later.  And 4xe may be the model by which to measure our expectations. Its introduction didn't come completely out of nowhere, but it was rather sudden for what turned out to be such a solid offering. That bodes well for the company's existing Hemi-powered trucks and SUVs. The Ram 1500, Jeep Grand Cherokee and Wagoneer are all strong candidates to receive the new Hemi replacement, as all would greatly benefit from even small improvements in fuel economy. If there's to be a future for the Dodge Charger and Challenger and Chrysler 300, they'd benefit too. And how about a Gladiator with the wick turned up, positioned as its equivalent to the Wrangler 392. Turn that Tornado into a Dust Devil. Don't worry; we've got plenty more where that came from.  Related Video This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.