Landcruiser 100 series 2006 T/D Auto - Transfer stuck in HI range

Refusal of HI-N-LO transfer lever to move out of HI range turned out to be lack of use!! Below the rubber boot under the plastic and leather covers, the steel transfer lever is attached to a horizontal shaft which is retained in a cast housing bolted to the top of the transmission case. Lack of use allows corrosion between shaft and housing to cause stiffness and eventual inoperability. External squirting with WD40 is insufficient. First remove plastic covers around gear sticks in cabin. Then solution involves removal of this part of the linkage ie lever plus shaft and housing, then disassembly and elimination of corrosion, re-lubrication and re-installation. Removal of transfer case is not required. Diff Lapping (Qld) in Kedron solved the problem. See attached diagram.