Oak Ridge Leadership Computing Facility. The OLCF was established at Oak Ridge National Laboratory in 2004 with the mission of standing up a supercomputer 100 times more powerful than the leading systems of the day.
Centre Diff Lock To Stop Centre Diff Lock being engaged automatically when low range is selected Toyota deemed that the centre diff would be locked automatically when low range was selected in it's constant 4X4 80 Series.There are many situations when this is in fact not desirable.entre Diff Lock To Stop Centre Diff Lock being engaged automatically when low range is selected Toyota deemed that the centre diff would be locked automatically when low range was selected in it's constant 4X4 80 Series.
When needed (usually beyond pavement) 4WD can be engaged. 4WD is used part of the time. When 4WD is engaged front wheels are powered as well - if the vehicle has manual hubs on the front wheels, they need to be locked first. There are two different settings for 4WD - high and low. 4WD high, sometimes called high range, cannot be used on dry pavement with a part time  system. For extreme situations 4WD lowis available, it cannot be used on dry pavement either. however, it provides two to three times more torque at about half or a third of the speeds in high range.