Must it be stationary?
2. When can RD lock be selected? in 2hr, 4hr, 4llc, or 4Lr?
I am new to this car, I dont want to "fry" up.

Sounds about right, except that I am not sure if Rear Difflock will work in 4HL or only in 4LLBostokkelos wrote:Ok so this means,1. I can go from 2wd to 4wd under 100km/h. it has then a 67% rear 33% front power distribution. 2. I can then go to 4wd in high range with a center diff locked, giving me 50%/50% power to wheels distribution.3. then i must be stationary, in N to go to low range. I can only select RD lock when centre diff lock is engaged,in high range or low range.?
You can engage 4H at up to 100 km/h, but I believe that you have a first generation Super Select transfer box in the Sport, i.e. the manually shifted version. This transfer box has a conventional bevel gear center diff and not a planetary center diff as used in the electrically shifted Super Select II transfer box used in the Gen 3 and Gen 4. A normal bevel gear center diff splits torque (not power) equally between the front and rear axles, but this center diff is, well diff-erent: it has a viscous coupler connecting the front and rear propshafts turning it into a viscous limited slip diff. This setup means that it will only split torque 50/50 if both the axles has equal traction. If one axle starts to spin out, torque is biassed to the other one.Bostokkelos wrote:1. I can go from 2wd to 4wd under 100km/h. it has then a 67% rear 33% front power distribution.
No. Locking the center diff will ensure that the front and rear propshafts rotate at the same speed, but the torque will be distributed according to the traction available. Power is the product of torque and rotation speed, so in general power will not split 50/50, although this could be the case if both axles have equal grip. This concept is frequently misunderstood and mis-explained in the motoring world.Bostokkelos wrote:2. I can then go to 4wd in high range with a center diff locked, giving me 50%/50% power to wheels distribution.
Once again, what does your owner's manual say? Different vehicles are set up differently, so I, as the owner of a 2003 Gen 3 DiD would not really know exactly how yours works. As far as I know, all Super Select boxes are supposed to go into LLc when the autobox is in P or N.Bostokkelos wrote:3. then i must be stationary, in N to go to low range. I can only select RD lock when centre diff lock is engaged,in high range or low range.?