[overhanger]

There are two solenoids used in the FJ62 T/case shifting system - one to engage and one to disengage. The disengage is on whenever you are in 2WD so it is the one that gives up the ghost first. Swap the vacuum hoses between the two solenoids for the time being to get back to 2WD. You'll have to push the 4WD button to disengage the front drive when the hoses are reversed.