I recently bought a J reg Fourtrak. its a 2.8 T. It has Auto locking Hubs and a button on the dash to turn the 4WD on.
When it has been in 4WD and i turn it off the 4WD light on the dash does not go off. It seems to be a bit fadey (As in the light is not at full brightness and seems to dim a bit as soon as you press the 4WD button and then come back bright again) I noticed when i was driving along there was a bit of a bang as tho i was going through a pot hole (but i dont think i did) and the 4WD seemed to go off. Im pretty sure that the 4WD does disengage because when i turn it on i can hear it engaging at the front. Could it be that only one of the locking hubs is dissengaging?