Subscribe to a magazine

Engine

Back to article View Gallery
2 of 5
The new E85-capable 4.7L V-8 offers improved fuel mileage as well as a 42hp and 19-lb-ft torque boost over its predecessor. It generates 302 hp at 4,600 rpm and 329 lb-ft of torque at 3,600 rpm. This increase is due in part to a pair of plugs per cylinder, an increased compression ratio, an improved cylinder-head port flow, and a new combustion system. The four-seven is backed by a 5-45RFE five-speed automatic transmission and power is split to the axles via a standard part-time NV233HD two-speed transfer case or an optional NV244HD full-time two-speed 'case. Both offer a 2.72:1 low-range which translates to a respectable 32:1 crawl ratio. Our trip computer showed that the engine was averaging slightly over 20 mpg on the highway at 75 mph. It was quiet, refined, and noticeably peppier than the engine it replaces.

Advertisement