LAS VEGAS — Ram is thriving. The truck brand is coming off its best sales year ever, and its all-new 2019 Ram 1500 has won just about every truck award there is to win, including North American Truck of the Year. Now Ram is launching the world's torquiest pickup truck ever, the new 2019 Ram Heavy Duty. The burliest version packs 1,000 pound-feet of twist, but there's a lot more to this truck than its obscene amount of low-end grunt. It's also the quietest, most comfortable, and most refined heavy-duty pickup Ram has ever made. Most power, payload and towing The 2019 Ram Heavy Duty isn't exactly all-new. It's more of a major refresh, the HD's first since 2014 and the second since this generation debuted in 2010. The truck is now infused with much of the styling, technology and much of the interior of its light-duty little brother, the Ram 1500. Only the HD's cab, doors and bedsides are essentially unchanged, along with its 6.4-liter Hemi V8, which is now standard on all 2500 and 3500 models. The unpopular 5.7-liter Hemi is no longer available. Ram continues to offer two versions of its Cummins inline six-cylinder diesel power on all models except the 2500 Power Wagon. The 6.7-liter Cummins Turbo Diesel, which costs an extra $9,100, and the High-Output version have both been reengineered for more power, more durability and significantly less noise. The Cummins still pumps out 370 horsepower at 2,800 rpm, but its torque output has jumped from 800 to 850 pound-feet at 1,700 rpm. The HO version, which is only available on the 3500, gets a 15 hp bump to 400 hp at 2,800 rpm, and its torque climbs from 930 to that magical 1,000 lb-ft at 1,800 rpm. Redline remains at just 3,250 rpm, and a column-shifted six-speed automatic still backs both engines. Hemi models, including the Power Wagon, have been upgraded to an 8HP75R eight-speed from ZF and a dash-mounted rotary shifter. The Hemi's power ratings are unchanged at 410 hp and 429 lb-ft of torque, but the V8 now has a more advanced cylinder deactivation system for improved fuel economy and smoother operation when only four of its cylinders are firing. The eight-speed's gearing also betters the Power Wagon's crawl index from 35:1 to 51:1 for improved low-speed off-roading. Most Ram HD buyers spring for the diesel. The most popular model is the 2500 4x4 Crew Cab Laramie with the Cummins, but trucks with the 6.4-liter and the new eight-speed feel considerably quicker on the road. Even the big boy 3500s. Where's that diesel rattle? Both versions of the Cummins get a new Compacted Graphite Iron block, which is lighter and 75 percent stronger. There's also a new cylinder head with an all-new valvetrain, lighter and stronger pistons, new bearings, a new exhaust manifold, a new quieter scissor gear drive and a new turbo for more flow. Max boost on the HO, which costs an extra $11,795, is now 33 psi. Both engines …
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