NO DRIVING ON DRY PAVEMENT with it locked in, well unless you hate your current transfer case, jeezso, i have an update on this. i changed all the fluids, F&R Diff, transfer case and transmission. and i took this for a short trail ride today. it no longer feels like the 4WD system is binding anymore. even on dry pavement (at speeds between 10 &55 mph). i am certain that it will on pavement at low speed and doing tight turns. that is normal. so the oil must have been very old, or the wrong type.