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.
The default for action for 1998 and 1999 model 100 series vehicles is when you shift the transfer case to the Low range the center diff locker is automaticly engaged whether you want it that way or not. The pin-7 mod disables the automatic engagement so you can choose to have an open center diff in the Low range.Giving you full control to use Low range on surfaces with high traction without drivetrain windup. This behavior is already incorporated into 2000 model year and beyond 100 series.he pin-7 mod disables the automatic engagement so you can choose to have an open center diff in the Low range. Giving you full control to use Low range on surfaces with high traction without drivetrain windup. This behavior is already incorporated into 2000 model year and beyond 100 series.