Driving on the road, with absolutely no warning, the vehicle suddenly lost any control of the drivetrain. vehicle was left coasting in traffic, and the engine would rev without any influence on moving the suv. the mechanic identified it as a known problem where the output shaft of the transmission strips the input shaft of the transfer case due to excessive fretting corrosion caused by insufficient lubricant/protectant applied to the shafts at assembly. i also read about others experiencing the problem while driving in traffic (range rover forum posts). this initially left me in the middle of moving traffic with no way to move out of the way of oncoming traffic, as it has left others that have described the same sudden failure on the internet. the only remedy offered at the dealership is to replace the entire transmission and entire transfer case at a cost in excess of $13,000.00.