Jeep Grand Cherokee SRT8
The 2006 Jeep Grand Cherokee is the fastest Jeep ever made. Powered by a 6.1-liter HEMI® V-8 producing 420 horsepower (313 kW) and 420 lb.-ft. of torque (569 N•m), which adds 90 more horses and 25 percent more power than the 5.7-liter HEMI-equipped 2006 Jeep Grand Cherokee, the all-new 2006 Jeep Grand Cherokee SRT8’s performance numbers include 0-60 mph in less than 5 seconds, 0-100-0 mph in the low 19-second range, and 60-0 mph braking distance of less than 125 feet.
To create the first SRT vehicle with full-time four-wheel drive, SRT engineers developed a drive system that was lightweight, yet robust and reliable enough to handle massive amounts of horsepower and torque from the 2006 Jeep Grand Cherokee SRT8’s powertrain. One part of the equation was to create a new transfer case, combining housing components from two existing units with the upgrades needed to make it SRT-capable.
SRT engineers opted to use the front half of a Jeep transfer case chosen for its capability and light weight. It was mated to the rear half of a heavier-duty case, chosen for its ruggedness and ability to house the electronic full-time four-wheel-drive system components. The transfer case output shaft was upgraded to handle high torque generated by the SRT 6.1-liter HEMI.
The result is the all-new 2006 Jeep Grand Cherokee SRT8’s unique transfer case, which provides the necessary power-handling capabilities for the Jeep Grand Cherokee SRT8 while weighing 60 pounds less than a Jeep heavy-duty case.
Under normal driving conditions, five percent to 10 percent of torque is directed to the front wheels, but as much of the 6.1-liter HEMI’s torque as needed can be directed forward when additional traction or stability is required.
Source: Jeep press