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Home » Hummer Timeline » 2006 Hummer H3
Overview - Engine & Drivetrain - Suspension - Style - Safety - Specs - Photos
Engine & Drivetrain
Specifically designed as a truck engine, the Vortec 3500 is a 3.5L inline five-cylinder offering an excellent combination of power and efficiency. The engine delivers 220 horsepower at 5600 rpm and 225 lb.-ft. of torque at 2800 rpm. In terms of performance, the Vortec 3500 provides the H3 with excellent power and control for off-roading, with comfortable and capable on-road characteristics, including acceleration that equals the V-8 powered H2 in most driving conditions. The Vortec 3500 brings premium features and advanced technologies –- including dual overhead cams, variable valve timing, electronic throttle control and low mass. The engine also features unique counter-rotating balance shafts to help minimize noise, vibration and harshness.
The Vortec 3500 is available in the H3 with either a standard, smooth-shifting five-speed manual transmission or a Hydra-Matic 4L60-E electronically controlled four-speed automatic transmission. The automatic transmission includes shift modes specific to low-range operation, which, combined with speed-based throttle progressions, help optimize driveability in low-range, off-highway operation.
The H3 also has a standard new Borg-Warner two-speed electrically controlled full-time four-wheel-drive system with a 2.64:1 ratio low-range gear reduction for highly controlled off-road obstacle climbing. An optional version provides aggressive low range gearing –- a 4.03:1 ratio –- for ultimate obstacle-climbing control.
Both versions provide the choice of operating modes:
  • 4High-range Open, for optimum highway performance and comfort under normal road conditions
  • 4High-range Locked, which allows torque to be transferred to the front or rear wheels as needed
  • 4Low-range Locked, for severe off-pavement use, such as crawling over large rocks or logs, or deep sand or snow.
  • 4Low-range Locked plus driver-selectable electronic rear differential locked, with the optional 4.03:1 low-range transfer case gearing, providing crawling and climbing power every bit as capable as the legendary H1 and H2.
  • Neutral, for flat-towing the H3.
H3's more maneuverable size provides advantages, such as a 37-ft. turning circle and 9.1-inch ground clearance, which contribute to maximum breakover angle of 25 degrees (with 33-inch tires). Serious off-road performance is also aided by the maximum approach angle of 40 degrees and maximum departure angle of 37 degrees. These approach and departure angles permit the H3 to drive right into a hole and back out again, without getting hung up in front or rear.
Among its off-road capabilities, the H3 can ford 16 inches of water at 20 mph or 24-inch streams at a 5-mph pace, climb 16-inch vertical steps and rocks, make its way through deep sand and race over sandy surfaces.
Overview - Engine & Drivetrain - Suspension - Style - Safety - Specs - Photos
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