The initial design development for the PowerTech V6 and V8 engine family was done by American Motors Corporation (AMC) and debuted in 1998 with credit to Chrysler. This was the first new V8 engine for Chrysler since the 1960s. The companion V6 was basically the V8 with two fewer cylinders, another concept that originated at AMC before the company joined Chrysler. These new engines had nothing in common with the Chrysler A engine V8s, nor the Jeep 4.0 L "PowerTech" I6 engine. A 4.7 L V8 came first, available in the Jeep Grand Cherokee, and a 3.7 L V6 version debuted in 2002 for the Jeep Liberty. The PowerTech V6 and V8 were direct replacements for Chrysler's LA family in the early 2000s, and were also used in the Dodge Ram and started in the 2000 Dodge Durango. They were not used in any cars, but were reserved for truck and SUV use. They are also known as Next Generation Magnum in Dodge applications. The PowerTech V6 and V8 engines were produced at the Mack Avenue Engine Complex in Detroit, Michigan. E85 compatible versions of some PowerTech engines were developed and used in numerous Chrysler vehicles. On April 9, 2013, the last 4.7 L engine was built; ending 15 years of production with over 3 million units built. 4.7 The 4.7-liter version was the first of this family, appearing in the 1999 Jeep Grand Cherokee. The displacement is with a bore and a stroke of . It has a cast iron block and aluminum heads with two valves per cylinder. It uses chain-driven Single overhead camshafts, one in each head. It originally produced and of torque. The 4.7 L V8 is available with four speed and five speed automatic transmissions and a 5 speed manual transmission. The PowerTech was on the Ward's 10 Best Engines list for 1999. 1999–2009 Jeep Grand Cherokee 2000–2007 Dodge Dakota 2000–2009 Dodge Durango 2002–2007 Dodge Ram 1500 2006–2009 Jeep Commander 2007–2009 Chrysler Aspen 2006–2007 Mitsubishi Raider 4.7 HO A "High-Output" version of the 4.7 L PowerTech engine, producing and of torque, was introduced in 2002, first appearing in the Jeep Grand Cherokee Limited as an option and in the Jeep Grand Cherokee Overland as standard equipment. This engine was discontinued after the 2008 model year, though the non high output 4.7L V8 engine continued to be available in all vehicles. Applications: 2002–2004 Jeep Grand Cherokee